US lakes & pondsUS lakes & pondsSurface area: The USGS National Hydrography Dataset outline (NHD Permanent ID 83408400).
The red circle marks Barnum Flat Reservoir.
Towns and counties: U.S. Census Bureau boundaries overlaid on the USGS lake outline (California: incorporated places touching the lake, otherwise the nearest one).
Official CDFW pages. Rules and fees change; check before you go.
No public access sites are listed for this water in the OpenStreetMap boat ramps (no statewide agency ramp layer used) data.
Shoreline: USGS National Hydrography Dataset (NHD Waterbody, Permanent ID 83408400), public domain. State outline: U.S. Census Bureau TIGERweb. Points: OpenStreetMap boat ramps (no statewide agency ramp layer used). Interactive map: Leaflet with © OpenStreetMap contributors. Not for navigation.
The closest airport with scheduled passenger flights to Barnum Flat Reservoir, plus larger airports within about 150 miles:
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Airports with scheduled airline service from OurAirports (large and medium airports); larger airports are FAA large, medium and small hubs by FAA CY2025 enplanements ("major airport" = FAA large hub). Distances are straight-line from the lake's center, not driving distance; road routes are longer.
Live from the National Weather Service API for the lake's coordinates (41.3222, -121.4716). The nearest station may be several miles away. NWS forecast for Barnum Flat Reservoir. No live water-temperature sensor is shown because we haven't found a public one for this lake.
Based on solunar theory, an estimate. Major periods (about 2 hours) center on when the moon is directly overhead or underfoot; minor periods (about 1 hour) center on moonrise and moonset. The 0–100 activity score rises during those periods and gets a boost near sunrise and sunset and around the new and full moon. Weather, water temperature and pressure often matter more. Sun and moon times are calculated in your browser from the lake's coordinates with standard astronomy formulas, shown in PT (America/Los_Angeles), and accurate to within a few minutes.
Barnum Flat Reservoir covers about 392 acres in McArthur, California (Siskiyou County).
Barnum Flat Reservoir touches McArthur in Siskiyou County, California.
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Straight-line distance between lake centers. All California lakes & ponds · All waters in McArthur