Lone Rock Campground
Currently closed for the season. Opens in June and operates through September. No reservations required; first-come, first-served.
National Forest System Roads
Follow California Vehicle Code on National Forest System Roads
Fireworks and Explosives are always Prohibited
Fireworks and explosives (including explosive targets) are always prohibited on national forest lands. The prohibition of fireworks and exploding targets on national forest system lands is part of a set of permanent fire safety regulations in the Code of Federal Regulations (CFR), listed below.…
Twin Lakes Trailhead Parking Lot Closure
Starting on September 9th 2026 and continuing for two weeks the Twin Lakes TH parking lot will be closed due to the repaving of the access road. Do not park in the lot beyond September 8th. Be prepared to use detours or alternate routes such as starting at the Rockbound TH. Please use caution…
About
Lone Rock Campground provides a secluded camping experience on Union Valley Reservoir in California's Eldorado National Forest. Unlike most campgrounds in the Crystal Basin area, Lone Rock requires non-motorized access: visitors can hike or bike approximately 5.8 miles along the Union Valley trail from Jones Fork Campground, or boat in from the Union Valley boat ramp. This makes it an excellent choice for campers seeking solitude away from the more developed campgrounds. The campground operates from June through September and offers basic amenities including vault toilets and picnic tables. There is no potable water available, so campers must bring their own supply. All trash must be packed out. Fishing and mountain biking are popular activities in the area. With no fees and limited accessibility, Lone Rock attracts self-sufficient campers comfortable with primitive conditions. The setting on Union Valley Reservoir provides excellent fishing opportunities and scenic lakeside camping for those willing to make the journey.
Directions
23 miles east of Placerville on Highway 50 and 14 miles north on Ice House Road (Forest Road 3). Access is by hiking or biking the Union Valley trail from Jones Fork Campground (approximately 5.8 miles) or by boat from Union Valley boat ramp.
Amenities
| Water | No |
| Fires Allowed | — |
| Toilets | Yes |
| Dump Station | No |
| Wifi | — |
| Pets Allowed | — |
| Showers | No |
| Electric Hookups | — |
| Water Hookups | — |
| Sewer Hookups | — |
| Camp Store | No |
| Price | $0 |
Vehicle
| Max RV Length | — |
| Max Trailer Length | — |
| Big Rig Friendly | No |
| Pull Through Sites | No |
Contact
| Phone | +1 (530) 644-2324 |
Cell Service
| AT&T | Yes |
| Verizon | Yes |
| T-Mobile | Yes |
Community Posts
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