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Blair Trail Reservoir

Glenns Ferry, Idaho — Elmore County.

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178Surface acres

Surface area: The USGS National Hydrography Dataset outline (NHD Permanent ID 53240554).

Location & fast facts

Where Blair Trail Reservoir is in Idaho

The red circle marks Blair Trail Reservoir.

Fast facts

About Blair Trail Reservoir

  • County: Elmore
  • Nearest city: Glenns Ferry (about 4.6 mi from the lake)
  • Mapped as: Lake or pond (USGS National Hydrography Dataset)
  • Distance: about 55 mi from Twin Falls and 59 mi from Boise, straight-line (not driving distance)

Towns and counties: U.S. Census Bureau boundaries overlaid on the USGS lake outline (Idaho: incorporated places touching the lake, otherwise the nearest one).

Fishing in Idaho

Official IDFG pages. Rules and fees change; check before you go.

Lake map

Blair Trail Reservoir shoreline

¼ mileN

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 53240554), 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.

Nearest airports

The closest airport with scheduled passenger flights to Blair Trail 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.

Conditions right now

Air temperature & conditions (nearest NWS station)Loading…
Fetching the latest National Weather Service observation…

Live from the National Weather Service API for the lake's coordinates (43.0566, -115.3141). The nearest station may be several miles away. NWS forecast for Blair Trail Reservoir. No live water-temperature sensor is shown because we haven't found a public one for this lake.

Sun, moon & best fishing times

Sun & moon at Blair Trail Reservoir

Best fishing times

Major periodMinor periodDaylight

    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 MT (America/Boise), and accurate to within a few minutes.

    Contact & official info

    Questions about Blair Trail Reservoir

    How big is Blair Trail Reservoir?

    Blair Trail Reservoir covers about 178 acres in Glenns Ferry, Idaho (Elmore County).

    What towns are on Blair Trail Reservoir?

    Blair Trail Reservoir touches Glenns Ferry in Elmore County, Idaho.

    Share a tip or fishing report

    Know Blair Trail Reservoir? Tell us about the launch, parking, where they're biting or anything a first-time visitor should know. Tips go privately to the LakeRipple editor; nothing is posted automatically. Helpful tips may be featured on this page (we'll use your first name only if you give one).

    Lakes & ponds nearby

    Straight-line distance between lake centers. All Idaho lakes & ponds · All waters in Glenns Ferry