Big Bear Lake

Big Bear Lake is a prominent man-made reservoir and popular year-round resort destination in the San Bernardino Mountains of San Bernardino County, California. Located about 100 miles (160 km) northeast of Los Angeles and roughly 25 miles (40 km) northeast of the city of San Bernardino, it sits within the San Bernardino National Forest at a high elevation, offering a striking alpine escape from Southern California’s lowlands.

Big Bear Lake covered in snow. Photo by James L Rathbun
Big Bear Lake covered in snow. Photo by James L Rathbun

Physical Description and Geography

Big Bear Lake is a snow- and rain-fed reservoir with no other tributaries or mechanical replenishment. It was created in 1884 by damming Bear Valley to supply irrigation water to citrus groves in areas like Redlands; the original rock dam was later supplemented by a larger multiple-arch concrete dam in 1912, which significantly increased capacity. The old dam remains submerged.

Key physical stats include:

  • Length: Approximately 7 miles (11 km) east-west.
  • Width: Up to about 2.5 miles (4 km) at its widest, though it averages a little more than 0.5 miles (0.8 km).
  • Surface area: Around 2,971 acres (12 km²).
  • Shoreline: Over 22 miles.
  • Average depth: 35 feet (11 m).
  • Maximum depth: 72 feet (22 m) near the dam.
  • Water volume: About 73,320 acre-feet (at optimum levels).
  • Surface elevation: Approximately 6,743–6,752 feet (2,055–2,058 m) above sea level, with the broader valley ranging from about 6,750 to 9,000 feet.

The lake is surrounded by rugged mountain terrain, dense forests (primarily ponderosa pines and other conifers), meadows, and rocky outcrops. It lies in a “Sky Island” ecosystem—an isolated high-elevation habitat with unique biodiversity, including rare plants. The city of Big Bear Lake (population around 5,000, though visitor numbers swell dramatically on weekends) occupies the south shore, while the north shore features more forested and recreational areas. Access is via scenic highways like CA-18 (Rim of the World Highway) and CA-38.

The area experiences a warm-summer Mediterranean climate (Csb) bordering humid continental (Dsb), with cooler temperatures and more precipitation than surrounding lowlands due to elevation. Summers are mild (daytime highs often 70–80°F, cooler nights), while winters bring significant snowfall (averaging 50–70+ inches seasonally at lake level, much more at higher elevations), making it Southern California’s primary skiing/snowboarding destination. It enjoys over 300 sunny days annually but can see freezing temperatures year-round.

Big Bear Lake viewed from Knickerbocker Road.
Big Bear Lake viewed from Knickerbocker Road.

Natural Beauty and Scenic Appeal

Big Bear Lake is renowned for its breathtaking natural beauty, often described as a sapphire or jewel nestled among towering peaks and pine forests. The clear, shimmering waters reflect the surrounding mountains, creating stunning vistas that change dramatically with the seasons.

  • Summer and Fall: Lush green forests line the shores, with wildflowers in meadows. The lake invites boating, with glassy waters ideal for reflection photos, especially at spots like Boulder Bay Park. Towering pines, quartz-rich outcrops, and distant desert views (e.g., toward the Mojave from higher points) add dramatic contrast.
  • Winter: Snow blankets the landscape, turning it into a pristine wonderland. Snow-capped peaks frame the partially frozen or icy lake, with evergreen trees providing striking color contrast. Ski resorts like Snow Summit and Bear Mountain enhance the alpine feel.
  • Overall Landscape: The high-elevation setting creates a sense of isolation and serenity amid Southern California’s urban sprawl. Panoramic views from trails, chairlifts, or overlooks (such as from Butler Peak) showcase the valley’s expanse, with the lake as a central blue gem amid forested ridges.

This beauty has made it a favorite filming location for movies like Gone with the Wind, Daniel Boone, and Old Yeller, as well as TV shows.

Wildlife and Ecology

A Stellar's Jay ( Cyanocitta stelleri ) stealing peanuts in Big Bear, California
A Stellar’s Jay ( Cyanocitta stelleri ) stealing peanuts in Big Bear, California

The region supports diverse wildlife typical of a Sky Island forest: black bears (introduced in the 1930s after grizzlies were extirpated), mountain lions, bobcats, coyotes, deer, and bald eagles (a winter highlight for viewers). There are also rare and endemic plants. The Big Bear Alpine Zoo aids injured wildlife. Fishing is popular, with trout, bass, and catfish abundant, though consumption advisories exist due to mercury/PCBs.

History and Development

Indigenous Serrano people (calling the area “Yuhaviat” or “Pine Place”) inhabited the valley for thousands of years. European-American naming and exploration came in the 1840s via Benjamin Wilson’s bear-hunting party. Gold rushes in the mid-1800s brought miners, followed by the dam and tourism boom in the early 20th century, aided by better roads and Hollywood interest. It evolved into a four-season resort with skiing (notably hosting early Winter X Games), hiking, and more.

Attractions and Recreation

Beyond natural beauty, Big Bear offers hiking/biking trails (over 100 miles), water sports, golf, the Big Bear Solar Observatory, and cultural spots like theaters and festivals (e.g., Oktoberfest). It balances accessibility with wilderness.

In summary, Big Bear Lake stands out as Southern California’s premier alpine lake destination, blending impressive physical scale, dramatic seasonal scenery, rich ecology, and recreational opportunities in a high-mountain setting that feels worlds away from the urban coast below. Its enduring appeal lies in this accessible yet pristine natural splendor.

Holcomb Valley

Holcomb Valley is a historic and scenic high-elevation valley in the San Bernardino Mountains of Southern California, located about 5 miles (8 km) north of Big Bear Lake. Nestled within the San Bernardino National Forest at elevations around 6,500–8,000 feet, it offers a rich blend of Gold Rush history, off-road adventure, and natural beauty that attracts history buffs, 4×4 enthusiasts, hikers, and nature lovers.

Holcomb Valley, San Bernardino Mountains, CA
Holcomb Valley, San Bernardino Mountains, CA

History of Mining

Holcomb Valley is best known as the site of Southern California’s largest gold rush. In May 1860, prospector William F. “Grizzly Bill” Holcomb (along with companions like Ben Choteau) discovered rich placer gold deposits while tracking a wounded grizzly bear. The find sparked a major rush, drawing thousands of miners to the area. Boom towns sprang up quickly, with Belleville (named after the first child born there) becoming the largest settlement. At its peak, Belleville rivaled San Bernardino in population and was briefly one of the largest towns in Southern California, supporting up to around 10,000 residents at times.

The valley produced more gold wealth than any other mining district in Southern California through placer mining in streams and later quartz lode mining. It was a classic Wild West setting: violence, claim jumping, gambling, and even public hangings were common. A notorious “hanging tree” still stands as a reminder. Mining activity declined after the initial rushes (around 1862 and a smaller one in the 1870s), though intermittent operations continued into the 20th century, including power-shovel work in the 1930s. Today, ruins of cabins, mines, and sites like the Pygmy Cabin remain, along with interpretive markers on the Gold Fever Trail. The area is designated California Historical Landmark #619.

4×4 Trails and Off-Roading

Holcomb Valley is a premier destination for off-road enthusiasts. The main route, Holcomb Valley OHV Road (Forest Road 3N16), stretches about 26 miles from near Green Valley Lake to areas near Baldwin Lake. It is generally considered easy to moderate, suitable for stock 4x4s, high-clearance SUVs, and even careful two-wheel-drive vehicles in dry conditions (though 4WD is recommended, especially after rain or snow).

The historic Gold Fever Trail is a self-guided 4×4 tour that takes visitors past key mining sites with interpretive stops. Trails feature a mix of dirt roads, rocky sections, mild ruts, forest stretches, and open terrain. Side spurs lead to abandoned mines, meadows, and viewpoints. The area connects to other OHV routes, allowing for customizable adventures. It’s popular year-round but can get muddy or snowy in winter. Nearby trails like Holcomb Creek OHV Trail offer more challenging options.

Camping is available at Holcomb Valley Campground (first-come, first-served sites with picnic tables, fire rings, and vault toilets), and dispersed camping is possible in designated areas.

Scenic Beauty

Holcomb Valley dazzles with its alpine charm. Towering Jeffrey pines, open meadows, granite outcrops, and wildflower-filled valleys create a picturesque landscape, especially in spring and fall. Views extend across the mountains, with opportunities to see wildlife, seasonal streams, and distant peaks. The contrast between forested western sections and more open, desert-like eastern areas adds variety.

It’s a peaceful retreat with sweeping vistas, quiet forests, and remnants of history integrated into the natural setting. Visitors often describe it as a “living monument” to the Gold Rush era, blending rugged pioneer legacy with serene mountain scenery ideal for photography, hiking, mountain biking, or simply soaking in the views.

Whether you’re exploring historic ruins along the Gold Fever Trail, wheeling through the backcountry, or enjoying a quiet picnic amid the pines, Holcomb Valley delivers an unforgettable slice of California’s mountain heritage and outdoor splendor. Always check current forest conditions, road status, and fire restrictions before visiting.

Holcomb Valley Points of Interest

The remains of an Arrastres located in Belleville, San Bernardino, CA

Arrastres – Gold Fever Trail

The Arrastres is a point of interest found along the Gold Fever Off Road Trail in Holcomb Valley in the San Bernardino Mountains. The remains…
The cabin at the Belleville California townsite is not original but moved to the location to represent the style of the structures of the town.

Belleville California – San Bernardino County Ghost Town

The cabin at the Belleville California townsite is not original but moved to the location to represent the style of the structures of the town.…
Jonathon Tibbets Grasshopper Quartz Mill is stop number four on the Gold Fever Off Road Trail in Holcomb Valley, California.

Jonathon Tibbets Grasshopper Quartz Mill

Stop number four along the Gold Fever Off Road Trail is Holcomb Valley, is Jonathon Tibbets Grasshopper Quartz Mill. The Gold Fever Off Road Trail…
The trail head for Two Gun Bill's Saloon along the Gold Fever Off Road Trail in Holcomb Valley, San Bernardino County, California

Two Gun Bill’s Saloon

Located at stop 3 along the Gold Fever Off Road trail is the supposed location of Two Gun Bill's Saloon in Holcomb Valley, California. The…
Charles Wilbur's Grave located in Holcomb Valley, San Bernardino, California

Wilbur’s Grave

Charles Wilbur's Grave is a point of interest located in Holcomb Valley near the Holcomb Valley Campground, San Bernardino, California. Charles Wilbur's Grave located in…

Holcomb Valley 4×4 Trails

The cabin at the Belleville California townsite is not original but moved to the location to represent the style of the structures of the town.

Gold Fever Off Road Trail

The Gold Fever Off Road Trail is a back country drive by some historical sites in Holcomb Valley, in the San Bernardino Mountains. The trail…

Gold Mountain 3N69

Gold Mountain Trail Head The Gold Mountain 3N69 Trail can be found in the San Bernardino National Forest near Big Bear Lake. The favored direction…
Holcomb Valley, San Bernardino Mountains, CA

Holcomb Valley Road 3N14

Holcomb Valley Road 3N14 takes you through scenic Holcomb Valley Holcomb Valley Road 3N14, is a main artery in the road system above and behind…

Jacoby Canyon 3N61

Jacoby Canyon 3N61 Trail head Jacoby Canyon 3N61 is a trail which can be found in the San Bernardino National Forest near Big Bear Lake.…

John Bull Trail 3N10

The John Bull Trail 3N10 has the solid reputation as one of the toughest and most challenging trails in the Big Bear mountains of San Bernardino…

Lake Mamie – Mammoth Lakes

Lake Mamie is a small, scenic alpine lake in the Mammoth Lakes Basin of the Eastern Sierra Nevada, Mono County, California. It is one of the chain of lakes accessible via Lake Mary Road, just a few miles from the town of Mammoth Lakes.

Paddle boardes enjoy the quiet calm of Lake Mamie, Mammoth Lakes, Inyo National Forest.  Photo by James L Rathbun
Paddle boardes enjoy the quiet calm of Lake Mamie, Mammoth Lakes, Inyo National Forest. Photo by James L Rathbun

Location and Access

Lake Mamie sits at approximately 8,900–8,901 feet (about 2,713 meters) elevation, nestled in a sub-alpine forested setting between larger Lake Mary (to the west/upstream) and Horseshoe Lake (to the east). It is easily reachable by car along Lake Mary Road (about 3–3.5 miles from town), with parking and trail access near the Twin Falls Overlook or along the Lakes Basin Path. In summer, facilities like Wildyrie Lodge/cabins nearby offer boat rentals, tackle, and snacks. Winter access is by ski or snowshoe only.

The lake forms part of the broader Mammoth Lakes Basin, a large glacial cirque carved by ancient ice and featuring rugged peaks, including views of Crystal Crag and Mammoth Mountain.

Physical Description

  • Size: Roughly 19 acres, making it the smallest lake in the Mammoth Lakes Basin. It has a relatively short shoreline (about half a mile), which contributes to its intimate, protected feel.
  • Depth: Shallow, generally around 8–10 feet or so at its deeper points, with excellent water clarity. This shallowness supports good visibility and makes it suitable for certain activities while limiting others (e.g., no motorboats).
  • Hydrology: Water flows in from Lake Mary through a canopy of evergreens at the inlet. The outlet feeds a spillway/waterfall that drops toward Twin Lakes below. A dam influences water levels, and the lake is part of the connected basin system.
  • Surroundings: Surrounded by towering pines, evergreens, and sub-alpine forest. It lies in a glacial moraine setting within the broader Sierra Nevada landscape shaped by volcanism (including Mammoth Mountain) and glaciation.

The water is typically clear and calm, especially since motorboats are prohibited, preserving a tranquil environment.

Natural Beauty and Scenic Qualities

Lake Mamie is frequently praised for its jaw-dropping scenery despite its small size. It is framed by dense woods, with reflections of snow-capped peaks (like Crystal Crag) and granite features on its clear waters. The setting offers “breathtaking views at every angle,” with light playing across the surface, especially at sunrise, sunset, or from the road crossing above the dam.

One angler/author described it as having “perhaps one of the best views of any lake in the world.” The protected, wooded location makes it feel more intimate and secluded than larger neighboring lakes, with opportunities to spot wildlife such as deer, coyotes, waterfowl, and occasionally bears (especially in summer).

In fall, the area features vibrant colors; in winter, it transforms into a snowy wonderland accessible for cross-country skiing or snowshoeing. The easy accessibility combined with its peaceful character makes it ideal for photography, lounging, and quiet contemplation.

Ecology and Recreation

The lake supports fishing and is regularly stocked with trout, including rainbows, brookies, and notable browns/Alpers trout. It is popular for shore fishing, float tubes, canoes, and kayaks. Dusk is often cited as a prime time.

Other activities include picnicking at scenic spots (with views of Mammoth Mountain and the spillway), short loops or trails around the lake (e.g., an easy ~1-mile Lake Mamie Loop with minimal elevation gain), and general lounging. No swimming is allowed in the basin lakes. Nearby camping is available at sites like Twin Lakes.

History and Naming

The name “Mamie” has a couple of origin stories. One links it to Lake Mary (possibly after Queen Mary), with “Mamie” as a nickname or for a smaller related lake. Another ties it to colorful local figures from the area’s mining-era dancehall days. The basin itself has ties to mining history (e.g., nearby Mammoth Consolidated Mine) and was shaped by the Long Valley Caldera volcanism and glaciation.

Summary of Appeal

Lake Mamie stands out as a gem for those seeking serenity amid stunning alpine scenery. Its small size belies its visual impact and recreational value—offering clear waters, forested shores, mountain backdrops, and easy access without the crowds of larger lakes. Whether for a peaceful paddle, a productive fishing session, a family picnic, or simply soaking in the views, it exemplifies the natural beauty of the Mammoth Lakes area. Visitors should practice Leave No Trace principles, be aware of wildlife (including bears), and check conditions, as the high-elevation environment can change quickly.

This report draws from local tourism, trail, and recreation sources for an up-to-date overview as of 2026. For the latest access, fishing regulations, or safety info, consult Inyo National Forest or Visit Mammoth resources.

Twin Lakes – Mammoth Lakes

Twin Lakes in Mammoth Lakes, California, is a scenic pair of connected alpine lakes in the Mammoth Lakes Basin within the Inyo National Forest in Mono County. They sit at the base of the southeastern slope of Mammoth Mountain in the eastern Sierra Nevada.

Twin Lakes with its waterfall, located in Mammoth Lakes, CA. Photo by James L Rathbun
Twin Lakes with its waterfall, located in Mammoth Lakes, CA. Photo by James L Rathbun

Physical Description and Geography

Twin Lakes are the lowest in the Mammoth Lakes Basin, with a surface elevation of approximately 8,563–8,600 feet (about 2,610 m). They are accessible by car year-round via Lake Mary Road and Twin Lakes Road, unlike many higher lakes in the basin.

The lakes are often described as a single body of water with a narrow “choke” or connection in the middle, sometimes bridged for visitors. They consist of an Upper and Lower Twin Lake, linked by the picturesque Twin Falls (also called Twin Lakes Falls), which cascades from the upper section (fed from Lake Mamie above) into the lower. The primary inflow is Twin Falls, and the primary outflow is Mammoth Creek, making the lakes the source of this waterway.

Scenic Twin Lakes waterfall and bridge, located in Mammoth Lakes, CA. Photo by James L Rathbun
Scenic Twin Lakes waterfall and bridge, located in Mammoth Lakes, CA. Photo by James L Rathbun

One side features dramatic lava cliffs formed by eruptions of Mammoth Mountain, highlighting the area’s volcanic geology. The other side borders forested areas with the Twin Lakes Campground and Tamarack Lodge. The basin was shaped by glacial activity, with surrounding features like Panorama Dome.

Size details vary in sources, but they form a substantial alpine lake system (one reference notes around 108 acres for fishing purposes; related Twin Lakes in the region are larger). Depths reach up to around 40–55 feet in channels. The water is typically clear and cold, reflecting the high Sierra environment.

Scenic Beauty and Surroundings

Twin Lakes are renowned for their stunning natural beauty, nestled amid lodgepole pine forests, with views of Mammoth Mountain (elev. ~11,059 ft) and surrounding peaks. The area offers mirror-like reflections on calm days, especially at sunrise or early morning, and vibrant seasonal changes—green summers, golden aspens in fall, and snow-covered winter landscapes.

Twin Lakes from above, located in Mammoth Lakes, CA. Photo by James L Rathbun
Twin Lakes from above, located in Mammoth Lakes, CA. Photo by James L Rathbun

The waterfall between the lakes (or from above) is a highlight, creating dramatic cascades visible from bridges, shores, and overlooks like Twin Falls Overlook. Panoramic views extend across the lakes to the town of Mammoth Lakes and beyond. The setting combines alpine lake serenity with volcanic rock formations and dense evergreen forests, often called part of the “California Alps” due to the rugged Sierra Crest and Sawtooth Ridge influences.

Visitors frequently praise the gorgeous scenery, clear water, and photo opportunities, with easy access enhancing its appeal. It feels pristine yet welcoming, with the scent of pines and mountain air.

Recreation and Amenities

  • Fishing: Popular for trout (stocked lakes); fish cleaning stations available.
  • Boating/Paddling: Boat rentals, kayaking, canoeing on the glassy waters.
  • Hiking/Biking: Lakeside paths, Lakes Basin Path (paved), connections to Mammoth Mountain trails, and nearby hikes like to Heart Lake or Panorama Dome.
  • Camping: Twin Lakes Campground with ~93 sites in three loops, suitable for tents and RVs, lakeside access.
  • Other: Tamarack Lodge (historic, with restaurant), general store, boat rentals, winter cross-country skiing, and an outdoor wedding chapel.

It’s family-friendly with easy access, though high elevation (~8,600 ft) requires acclimation for some.

History and Ecology

The area has volcanic and glacial history, with Mammoth Mountain’s lava domes and past mining activity nearby (e.g., Mammoth Consolidated Mine ruins). Ecologically, it supports trout fisheries and coniferous forests in a high-elevation environment.

Twin Lakes stands out as an accessible gem in the Mammoth Lakes area—beautiful year-round, with its connected waters, waterfall, volcanic backdrop, and forested shores creating a quintessential Sierra Nevada alpine scene that draws photographers, outdoor enthusiasts, and nature lovers.

For the most current conditions (e.g., road access, fishing regulations, or weather), check official sources like the U.S. Forest Service or Visit Mammoth.

Earthquake Fault

The Mammoth Earthquake Fault (or Earthquake Fissure) on Mammoth Mountain is a striking geological feature located in Inyo National Forest near Mammoth Lakes, California. It is a prominent, nearly straight fracture in the volcanic rock at the base of Mammoth Mountain, rather than a true fault with significant lateral or vertical displacement between the rock blocks.

Dimensions

  • Length: The visible fissure extends for several hundred feet (some descriptions note portions or related features along a longer alignment).
  • Width: Up to about 10 feet (roughly 6–10 feet in places, with sides that fit together like puzzle pieces when viewed closely).
  • Depth: Up to 60 feet.
  • It runs roughly north-south, cutting through hard, glassy rhyolite lava flows from Mammoth Mountain. The jagged, uneroded walls and lack of significant pumice fill indicate it is geologically young.

A short, easy 0.3-mile interpretive trail (mostly paved with some uneven stone steps) allows visitors to walk alongside and even descend into parts of the fissure. It sits at approximately 8,600 feet elevation in a forested area.

Geological History

The fissure formed primarily due to tectonic stresses in the Earth’s crust, associated with the ongoing volcanic and extensional activity in the Long Valley Caldera region. It is part of a broader system linked to the Mono-Inyo Craters volcanic chain.

Scientists estimate its formation occurred roughly 200–600 years ago (around 550–650 years ago in some accounts), during a period of intense volcanic unrest. This timeframe aligns with eruptions at the Inyo Craters, Inyo Domes, and related steam blasts and dome-building events. The fissure aligns with the dike (magma intrusion pathway) that fed some of these northern domes.

It is not the result of a single major earthquake but rather a fracture opened by crustal stretching and volcanic-related stresses. Trees growing in and around the fissure (some over 160 years old) confirm it has been open for at least that long, with its fresh appearance underscoring its relative youth in geologic terms.

The Mammoth Lakes area remains geologically active, part of the Long Valley Caldera system with a history of eruptions, earthquake swarms (notably in 1980 and 1989), and magma movement at depth. While this fissure itself is not directly tied to a specific historic quake, it highlights the region’s dynamic tectonic and volcanic environment, where future activity (magma rise or gradual infilling) remains possible.

Visitor Notes

The site is easily accessible off Highway 203, with parking, picnic tables, and interpretive signs. It offers a cool microclimate (cold air often rises from the depths, and snow can linger inside even in summer). Historically, local Native American groups reportedly used the fissure for food storage due to its natural refrigeration. Always practice Leave No Trace, watch your footing on the trail, and respect any seasonal closures or warnings.

This feature provides an excellent, hands-on look at the powerful forces shaping the eastern Sierra Nevada. For current conditions, check the Inyo National Forest website or visitor centers in Mammoth Lakes.