Agency-listedUSFSFeeRoad season: open (MVUM)
Spillway C.G. (Letts Lake)
Drive-up · U.S. Forest Service · CA · 39.30880, -122.71680
Ask an AI about this campsiteOpens Grok already loaded with this site. It reads the same records this page is built from, and links whatever it tells you.
Ask about this camp →U.S. Forest Service lists this as a developed campground. Expect marked sites, a fee station or a reservation, and the usual campground rules. The dispersed-camping freedom of the surrounding forest does not apply inside it. What changes is conditions — roads, gates, closures, fire rules. Check those with the unit before you commit to the drive.
Nearest road on the Forest Service MVUM — Spillway C.G. (Letts Lake) · Mendocino National Forest · CA
The nearest road on the Forest Service MVUM is FR 17N21 (Letts Lake C.G. North), 40 ft from the pin. The MVUM lists it as bituminous surface treatment surface and maintenance level 3 – suitable for passenger cars.
Road season: open (MVUM) The MVUM lists FR 17N21 (Letts Lake C.G. North), 40 ft from the pin, open to passenger vehicles year-round.
MVUM record for FR 17N21 (Letts Lake C.G. North): “01/01-12/31” Read against the calendar on 2026-09-22; with JavaScript your browser re-checks it against today.
From the Forest Service's own Motor Vehicle Use Map roads layer (EDW, Clearinghouse refresh Aug 30, 2026), straight-line from the pin to the nearest mapped segment. The nearest segment is not necessarily the way in, a maintenance level is the agency's class and not a report on today, and a road's season is the road's — it is not a campground order. What the levels mean → What an MVUM is →
USGS topo — contours & terrain
Aerial — USGS / NAIP
Weather outlook — at Spillway C.G. (Letts Lake)
Loading the latest forecast…
Live NWS area forecast (~2.5 km grid, not elevation-corrected). Camp sits at 4,546 ft.
Fire & smoke — around Spillway C.G. (Letts Lake)NIFC · AirNow
Checking active fires & air quality…
Active wildfires from NIFC (within ~50 mi); air quality from AirNow. Always confirm current fire restrictions with the managing office before you go.
Everything you need — measured from Spillway C.G. (Letts Lake) · Mendocino National Forest · CA
▲ your camp. Rings are 15, 30 and 60 straight-line miles; bearings are approximate and roads run longer.
Nearest of each
- WWater0 mi
- FFuel10 mi
- @Mail10 mi
- GGrocery14 mi
- EVEV fast charger15 mi
- DDump21 mi
- ShShower21 mi
- RxPharmacy21 mi
- MMechanic21 mi
- OOutfitter23 mi
- LLaundry25 mi
- +Urgent care25 mi
- HHardware26 mi
- AAir-up28 mi
- PPropane54 mi
≤30 mi30–4545+water
The read: water is basically at camp, fuel & food sit about 10 mi out.
One dot per need — the nearest of each kind, straight-line from camp. Places from OpenStreetMap (© OpenStreetMap contributors); the EV fast charger from the US DOE station locator. Open in Google Maps ↗
The site — Spillway C.G. (Letts Lake)
Access
Drive-up
Land
U.S. Forest Service
Elevation
4,546 ft
Ground slope
10.4% · noticeable
State
CA
Coordinates
39.30880, -122.71680
Cost
Fee
Nearby & resupply — around Spillway C.G. (Letts Lake) · Mendocino National Forest · CA (OpenStreetMap)
- Water featureUpper Letts Lake · ~0.1 mi · USGS: perennial lake or pond
- Nearest townStonyford · ~10.2 mi
- Rail & highwaynone mapped within 10 mi
- Drinking waterWater spigot · ~0.0 mi
- FuelStonyford General Store · ~10.3 mi
- Propane / LPGnone within 31 mi
- Dump station~20.7 mi
- GroceriesUpper Lake Grocery · ~14.5 mi
- PharmacyCVS Pharmacy · ~21.1 mi
- Hospital / clinicAdventist Health Clear Lake Medical Office - Clearlake, Live Well Program · ~25.2 mi
- HardwareMendo Mill · ~25.5 mi
EV charging — from Spillway C.G. (Letts Lake) · Mendocino National Forest · CA — nearest public DC fast & Level 2 (US DOE station data)
- Nearest public DC fast charger14.8 mi straight-line SW — Upper Lake, CA - Tesla Supercharger (at a rest stop) · Tesla · NACS (Tesla) · 8 fast ports listed · listed open, last confirmed by AFDC 2026-06-18 · hours: 24 hours daily. NACS partner enabled. · directions
- Public DC fast stations within reach1 within 25 mi · 26 within 50 · 417 within 100 · 1000 within 150
- Nearest listing CCS27.6 mi — Thurston Chrysler Dodge Jeep Ram, Ukiah
- Nearest listing CHAdeMO29.1 mi — Maxwell Rest Area - Northbound, Williams
- Nearest public Level 2 (J1772)14.4 mi — Tallman Hotel and Blue Wing Restaurant - Tesla Destination, Upper Lake, CA (at a hotel) · Tesla Destination · J1772, NACS (Tesla) · 2 Level 2 ports listed · listed open, last confirmed by AFDC 2026-08-27 · hours: 24 hours daily. Open to all vehicles.
- Pricing at the fast chargernot listed
- Power (kW)not listed by AFDC — “DC fast” spans roughly 24 to 350 kW, so ask the network.
- Read this honestlyStraight-line miles, like every distance on this site. Roads run longer than this, and you have to get back. We know where a charger is listed. We don’t know if it works today, how fast it is, or the road miles. Check the network before you commit.
Snapshot 2026-09-16 · AFDC record 368021 · US DOE Alternative Fuels Data Center
Nearby restrooms — around Spillway C.G. (Letts Lake) · Mendocino National Forest · CA — pit toilets, restrooms & rest areas (government data)
- Vault / pit toiletSpillway C.G. (Letts Lake) · at this camp · USFS
- Vault / pit toiletStirrup C.G. (Letts Lake) · ~0.2 mi E · USFS
- Vault / pit toiletSaddle Camp Loop C.G. · ~0.2 mi E · USFS
- Vault / pit toiletBig Spring (Day Use) · ~0.4 mi SE · USFS
Coming out here — Spillway C.G. (Letts Lake) · Mendocino National Forest · CA
- Surface water mapped nearby: USGS maps Upper Letts Lake as a perennial lake or pond, ~0.1 mi from the pin (National Hydrography Dataset, data refreshed October 2022). Mapped as perennial is not the same as flowing today. Nobody has checked it for you. Filter or boil anything you drink.
- Ground slope around the pin: about 10.4% — noticeable. Measured on USGS's 3DEP elevation model (1 m data here), sampled every 10 metres around the point. That is the hillside, not the ground under your wheels — a graded pullout or a bench a few metres across is too small to show up at that spacing, and nobody has checked this one for you.
- No rail line and no interstate or US route is mapped within 10 mi of the pin. Checked against the FRA/BTS North American Rail Network (data updated Jul 21, 2026) and the Census's TIGER/Line primary roads (TIGER/Line 2025, released Oct 2025). Both are national files and both are maps of what is built, not counts of what moves on it.
- Power: Dave carries his own — batteries or solar. A generator will run your rig and it is also the thing everybody camped near you can hear.
- Getting online: Dave recommends Starlink. He has had it since SpaceX introduced it, used it for four years living on the road, and it delivers as promised — several hundred nights out, and he can count on one hand the places he could not connect. The cable on his unit runs 150 feet, which is usually all it takes to find enough sky. Starlink → Referral link — Starlink pays Dave $100 in cash if you sign up through it, and that money funds this site and the next trip. It costs you nothing and does not change the recommendation.
Open Spillway C.G. (Letts Lake) elsewhere
Other camps near Spillway C.G. (Letts Lake)
If this one is full, gated or washed out.
- Stirrup C.G. (Letts Lake)~0.2 mi · fee
- Saddle Camp Loop C.G.~0.2 mi · fee
- Main Letts C.G.~0.6 mi · fee
- Mill Valley~0.8 mi · fee
The unit that manages Spillway C.G. (Letts Lake)
Stay limits, road closures and fire restrictions at Spillway C.G. (Letts Lake) are set by Mendocino National Forest, not by the campsite — check there before you go.
How we know this — Spillway C.G. (Letts Lake)
Source
U.S. Forest Service recreation data
Confidence
Likely — The record is good enough to put a pin on, but thin in places. Treat the details as a starting point, not gospel.
How it was placed
Developed FEE campground (not free) - review | auto:usfs-fee 2026-08-20: US Forest Service developed campground, agency coordinates, agency states a fee. No dollar amount in the agency record -- expect a charge and confirm the current rate before you go. Not field-verified. | Fee 2026-08-20: $12 per night, single site, May to September (Memorial Day-Labor Day); $6 per night off-season. Spillway is one of the four loops of Letts Lake Campground (Main Letts, Saddle Camp, Spillway, Stirrup), which is why the fee is published on the Letts Lake page. Source: https://www.fs.usda.gov/r05/mendocino/recreation/letts-lake-campground.
Nearest MVUM road
US Forest Service Motor Vehicle Use Map roads layer (EDW_MVUM_01, layer 1), Clearinghouse refresh Aug 30, 2026. Straight-line distance from the pin to the nearest mapped segment within 1 mi; surface type, maintenance level and open dates are the agency's own values for that segment, expanded from its codes and otherwise unedited. Nothing here says which road reaches the site.
EV chargers
US DOE Alternative Fuels Data Center station locator, snapshot 2026-09-16. Straight-line miles to the nearest public, open, unrestricted station; restricted and planned units are shown but never counted.
Field check
On the agency's books. The land manager inventoried this site, so its existence is not in question — current conditions are. Nobody from here has camped it recently.
What we don’t know about Spillway C.G. (Letts Lake)
A land record can put you within a few meters of a spot. It cannot tell you any of this — so check it yourself, and treat anything below as the open question it is.
- Whether that MVUM road is the way in, and the last stretch beyond it
- Whether the site itself closes on its own schedule — only the road's season is on record
- How many rigs actually fit
- Cell coverage by carrier
- Current fire restrictions
- Whether any water here is drinkable
- Shade & wind exposure
- Noise and who else shows up
- Whether a listed EV charger works today, or the road miles to it
Before you go — Spillway C.G. (Letts Lake)
Camping near a reservoir →What “dispersed” means here →Reading a forest MVUM →Dispersed camping tips →All field notes →