Main Letts Campground
Open — Open year-round, first-come, first-served. Main season runs Memorial Day through Labor Day at $12 per night with potable water available. Off-season rate is $6 per night; water may not be available in winter months.
Wet weather trail closure in effect on Grindstone District
A wet weather closure is in effect for Stonyford OHV trails on the Grindstone Ranger District, as of 10am, Dec. 23. Trail closures go into effect when two inches of rainfall occur within a 24-hour period or when the soils are saturated.
Wet weather trail closure in effect on Upper Lake District
A wet weather closure will go in effect for OHV trails on the Upper Lake Ranger District, as of 8am on Dec. 20, 2025. Trail closures go into effect when two inches of rainfall occur within a 24-hour period or when the soils are saturated.
Stonyford Office Hours Changing
The Stonyford Office's visitor services hours are changing beginning Jan. 5, 2026. Starting next year, the office will be open from Monday-Friday and closed Saturday-Sunday. Office hours are 8:30-4pm with a lunch break 12-1pm.
M10 Road Construction
The M10 road will be closed Monday, Nov. 17- 20, 2025. Closure location is above Fouts Springs near Dixie Glade. Main impacts are to the Letts Lake basin on Grindstone Ranger District. Detour to get to Letts Lake is via the M5 and 17N02 Roads, high clearance vehicle recommended.
Trail 34 on Upper Lake District closed due to unsafe conditions
OHV Trail 34 is closed due to trail tread degradation and rutting that runs 300 feet down the trail. The trail is unsafe due to unstable soil, extremely muddy conditions and increased runoff.
Trail 3 on Grindstone closed due to slide
Trail 85303 (Trail 3) on the Grindstone Ranger District closed due to landslide: Trail 85303 is closed between Trail 85304 and M5 Road for public safety and to protect natural resources. Unstable soil, downed trees and a steep drop off make this trail unsafe for users.
Cedar Camp Campground Closure
Cedar Camp Campground is closed for public safety. Closure is in effect through 6/18/26.
Chico Seed Orchard Public Use and Access Closure
Pets must be on a leash. Fall/winter hours are 7 a.m. - 5 p.m. beginning Nov. 1. Spring/summer hours are 7 a.m. - 7 p.m. A closure is in effect outside of these hours.
About
Main Letts Campground is part of the larger Letts Lake Recreation Area in Mendocino National Forest, situated around a scenic 35-acre lake at elevation. This loop contains 18 campsites, each equipped with a picnic table and fire ring. The campground is one of four separate loops (Main Letts, Saddle Camp, Spillway, and Stirrup) that together provide 42 total sites around the lake. The lake is restricted to non-motorized vessels only, making it ideal for quiet paddling, fishing, and swimming. Trout fishing is popular here, and the campground features a fully accessible fishing pier. A one-mile trail follows the shoreline, providing scenic views and easy hiking access. Vault toilets are available, and potable water is provided during the main season from Memorial Day through Labor Day. The campground operates on a first-come, first-served basis with no reservations. Check-in is at 2:00 p.m., check-out at 11:00 a.m., and quiet hours are enforced from 10:00 p.m. to 6:00 a.m. OHV riding is not permitted in the campground itself, though the area is near Fouts Springs OHV area. Two vehicles maximum are allowed per site. Payment can be made on-site via cash, check, or the Scan & Pay mobile app feature.
Directions
Located 19 miles west of Stonyford via M10 Road.
Nearby Campgrounds
Amenities
| Water | Yes |
| Fires Allowed | Yes |
| Toilets | Yes |
| Dump Station | No |
| Wifi | No |
| Pets Allowed | — |
| Showers | No |
| Electric Hookups | — |
| Water Hookups | — |
| Sewer Hookups | — |
| Camp Store | No |
| Price | $6 - $12 |
Vehicle
| Max RV Length | — |
| Max Trailer Length | — |
| Big Rig Friendly | — |
| Pull Through Sites | — |
Contact
| sm.fs.mendopao@usda.gov | |
| Phone | +1 (530) 963-3128 |
Cell Service
| AT&T | None |
| Verizon | None |
| T-Mobile | None |
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