Mammoth Lakes Backcountry Loop
High Sierra volcanic terrain and alpine lakes
This high-altitude loop climbs through the volcanic landscape above Mammoth Lakes, accessing remote corners of the Inyo National Forest that most visitors never see. The route connects old mining roads with forest service tracks, passing abandoned cabins from the 1880s gold rush, natural hot springs, and pristine alpine lakes nestled below 13,000-foot peaks. Key waypoints include the Sherwin Creek drainage, Valentine Lake access, and connections to the extensive Mammoth Mountain area trail system.
Most sections require 4WD with good ground clearance for rocky climbs and stream crossings, though a few technical spots favor experienced drivers with recovery gear. Snow closes high sections from November through June — plan summer visits with extra layers for sudden weather changes. The loop offers excellent dispersed camping with stunning Sierra Nevada views. You’ll experience the Eastern Sierra’s dramatic transition from sagebrush desert to alpine wilderness, with fishing, hiking, and photography opportunities that rival any mountain destination in California.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Backcountry |
| Surface | Dirt, Mixed, Rock |
| Features | Camping, High Altitude, Historic, Scenic, Water Crossings |
| Length (miles) | 45 mi / 72.4 km |
| Duration | 2 days |
| Max elevation (ft) | 10200 ft |
| Best season | July-October |
| Minimum vehicle | Stock 4WD high-clearance |
| Nearest town | Mammoth Lakes, California |
| Land manager | Inyo National Forest |
| Permit required | No |
| Cell service | Spotty |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Start coordinates | |
| End coordinates | |
| Copy both for Google Maps directionsClick to copy the directions URL · or open it directly in a new tab | |
| Find on Google | Search on Google → |
Location
Trail Conditions
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Frequently asked questions
Can a stock 4WD SUV handle this trail?
Yes, a stock 4WD with high clearance like a 4Runner or Wrangler can complete this trail. The rocky sections require careful line choice but nothing extreme.
Is the trail accessible before July?
No, snow typically blocks higher elevations until July. October is usually the last month before winter conditions return.
Do I need permits for this backcountry loop?
No special permits required for day use or dispersed camping. Standard Inyo National Forest regulations apply.
What's the hardest part of the trail?
Rocky volcanic sections near max elevation at 10,200 feet require the most technical driving. Take your time picking lines through the loose rock.
How deep are the water crossings?
Creek crossings are typically 6-12 inches deep during normal flows. They're seasonal and may be dry by late summer depending on snowpack.