USDA Forest Service · California

Big Flat Campground

USDA Forest Service · California, United States

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Restrooms
Yes
Elevation
5,062 ft
Dark sky
Bortle class 1
Cell coverage
T-Mobile none · AT&T none · Verizon none (carriers' 4G LTE filings to the FCC, 2025-12; not measured here)
Access road
BIG FLAT (NFSR 39N57) · native material · suitable for passenger cars
Lake
Klamath National Forest
Activities
<p>Camping in the Trinity Alps with access to Caribou Lakes. The Forest Service requests and recommends bringing certified weed free feed for horses entering the wilderness.</p>, A good area for riparian wildlife along the river and forest birding. Some small mammals frequent the campsites., Camping in the Trinity Alps with access to Caribou Lakes., Camping in the Trinity Alps with access to Caribou Lakes. , Camping in the Trinity Alps with access to Caribou Lakes. There is overnight horse camping and day use parking for trailers. The Forest Service requests and recommends bringing certified weed free feed for horses entering the wilderness., Great opportunities for day hiking in the Trinity Alps with access to Caribou Lakes. Wilderness permits are required for overnight but not for day hikes in Trinity Alps Wilderness. Day hikers should always yield to horses and livestock on the trail. Speaking to horses in a quiet voice will help them stay calm as they pass you., Swimming, wading and water play off the gravel bar on the South Fork of the Salmon River.

About

Big Flat campground has 9 campsites, and access to many trails in the Trinity Alps Wilderness, including the Caribou Lakes. There is no potable water or garbage service provided, but there are vault toilets in the campground. There is also a small corral. Due to elevation, accessibility determined by snow levels.

Weather, month by month

MonthTypical highTypical lowColdest nightHottest dayYears with a night below 32°F
January41°31°16°57°11 of 11
February42°29°10°61°11 of 11
March45°30°16°74°10 of 11
April51°32°19°69°11 of 11
May63°41°28°76°3 of 11
June73°48°33°92°0 of 11
July86°58°42°97°0 of 11
August85°58°49°96°0 of 11
September76°52°40°88°0 of 11
October68°46°33°78°0 of 10
November50°36°21°68°7 of 10
December41°31°9°58°9 of 10

Mid-month figures from 2016–2026 of daily weather at this spot (ERA5 reanalysis via Open-Meteo, CC BY 4.0), in °F. Typical is the median; coldest and hottest are the extremes seen.

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All public campgrounds in California · Every state and province · Facts read from the operator 2026-02-25. Confirm fees, rules and current status with the operator before you go.