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Thompson Reservoir

Van Tassell, Wyoming — Niobrara County.

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5.2Surface acres

Surface area: The USGS National Hydrography Dataset outline (NHD Permanent ID 154026559).

Nearest airports

The closest airport with scheduled passenger flights to Thompson 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.

Location & fast facts

Where Thompson Reservoir is in Wyoming

The red circle marks Thompson Reservoir.

Fast facts

About Thompson Reservoir

  • County: Niobrara
  • Nearest city: Van Tassell (about 16.6 mi from the lake)
  • Mapped as: Lake or pond (USGS National Hydrography Dataset)
  • Distance: about 108 mi from Casper and 132 mi from Cheyenne, straight-line (not driving distance)

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

Fishing in Wyoming

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

Lake map

Thompson Reservoir shoreline

0.05 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 154026559), 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.

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 (42.9952, -104.1776). The nearest station may be several miles away. NWS forecast for Thompson 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 Thompson 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/Denver), and accurate to within a few minutes.

    Contact & official info

    Questions about Thompson Reservoir

    How big is Thompson Reservoir?

    Thompson Reservoir covers about 5 acres in Van Tassell, Wyoming (Niobrara County).

    What towns are on Thompson Reservoir?

    Thompson Reservoir touches Van Tassell in Niobrara County, Wyoming.

    Share a tip or fishing report

    Know Thompson 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 Wyoming lakes & ponds · All waters in Van Tassell