California · USA

Crowley Lake to Benton Crossing — Owens Valley Volcanic Tableland Desert Loop via Long Valley Caldera

Hot springs and obsidian in the volcanic east Sierra.

Moderate

The Long Valley Caldera east of Mammoth Lakes is a supervolcano that last erupted 760,000 years ago and still makes its presence known through hot springs, fumaroles, and a tableland of volcanic tuff that looks like the moon with sagebrush. The loop from Crowley Lake east to Benton Crossing via the Owens River Gorge rim and the volcanic tableland keeps you on Bureau of Land Management dirt the whole way — graded two-tracks past obsidian fields worked by Paiute people for thousands of years, hot spring soaks at Benton Crossing where the Owens River runs warm, and big views of the Sierra crest from the east side where the range is at its most dramatic. This is eastern Sierra backcountry that doesn’t make the Instagram feeds because it requires leaving US-395 behind.

Moderate difficulty — a stock high-clearance 4WD handles it fine in dry conditions, but the tuff tableland track gets slick and can develop deep ruts after winter. Best run April through October; summer mornings before noon are ideal to avoid afternoon thunderstorms building off the Sierra. No permit required, dispersed camping is legal throughout the BLM tableland with Leave No Trace practices. Fuel in Mammoth Lakes or Bishop. Cell service exists near Crowley Lake but drops to nothing on the tableland proper — this is not a route to run on a bad weather day in a street SUV. The hot springs at Benton Crossing are the reward: soak in 100°F water with the Sierra Nevada above you and nobody for miles.

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Trail Specs

Difficulty
Trail Type, ,
Surface, ,
Features, , ,
Length (miles)38 mi / 61 km
Duration1-2 days
Max elevation (ft)7400 ft
Best seasonApril-October
Minimum vehicleHigh-clearance 4WD recommended
Nearest townMammoth Lakes, California
Land managerBLM — Bishop Field Office
Permit requiredNo
Cell serviceSpotty
Water crossingsNo
Dispersed campingYes
Official sourcesBLM Bishop Field Office
Inyo National Forest — Long Valley Area
Start coordinates
End coordinates
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Difficulty
Official: Moderate

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Frequently asked questions

Can a stock Tacoma or 4Runner handle this trail, or do I need a lift?

A stock high-clearance 4WD like a Tacoma or 4Runner handles this fine. The surface is dirt and gravel with no serious rock crawling — ground clearance matters more than lockers here. Lifted rigs aren't required, just don't bring a Prius.

When does the trail open in spring and is snow a real issue?

April through October is the reliable window. Snow can linger on the tableland into early spring and the trail can turn to slick mud when wet. Check with the BLM Bishop Field Office before heading out before May.

Do I need a permit or is there a fee to run this loop?

No permit required and no fee for driving the route or dispersed camping on BLM land. Standard Leave No Trace rules apply — pack out everything, and don't mess with the obsidian fields beyond looking.

What's the hardest section and what should I actually be ready for?

Nothing here will make you white-knuckle it, but the volcanic tableland sections can be rough, rutted, and uneven enough to punish low-clearance vehicles. The bigger hazard is sharp obsidian rock — a full-size spare and plug kit are not optional on this one.

Where exactly are the hot springs and can I camp right next to them?

Benton Crossing hot springs sit near the Owens River along the eastern end of the loop — easy to find, frequently visited. Dispersed camping is legal on the surrounding BLM land but established fire rings fill up on weekends; get there Friday morning if you want a decent spot near the water.

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