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Johnston Lake

Mud Lake, Idaho — Jefferson County.

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9.6Surface acres

Surface area: The USGS National Hydrography Dataset outline (NHD Permanent ID 43793210).

Getting there

Flying here

The closest airport with scheduled passenger flights to Johnston Lake, plus larger airports within about 150 miles:

Driving here

Pick up a rental car at the airport you fly into and drive to Johnston Lake.

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Staying here

Look for hotels in and around Mud Lake, ID.

Search hotels near Mud Lake, ID on Klook

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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.

Things to do near Johnston Lake

Look up tours, activities and attraction tickets around Mud Lake, ID on Klook.

Browse things to do near Mud Lake, ID on Klook

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Boat rentals near Johnston Lake

Browse boat, pontoon and kayak rentals and charters listed on GetMyBoat.

Boat rentals in Idaho on GetMyBoat

Listings, prices and availability are set by GetMyBoat and its hosts. Check the lake's own boating rules before you go.

Location & fast facts

Where Johnston Lake is in Idaho

The red circle marks Johnston Lake.

Fast facts

About Johnston Lake

  • County: Jefferson
  • Nearest city: Mud Lake (about 5.4 mi from the lake)
  • Mapped as: Lake or pond (USGS National Hydrography Dataset)
  • Distance: about 37 mi from Idaho Falls and 140 mi from Twin Falls, 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

Johnston Lake 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 43793210), 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 (43.9483, -112.4305). The nearest station may be several miles away. NWS forecast for Johnston Lake. 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 Johnston Lake

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.

    Fishing gear for Johnston Lake

    Basic freshwater tackle for a day on Johnston Lake. These open Amazon search results; check your state's fishing rules for the water before you buy bait or tackle.

    As an Amazon Associate I earn from qualifying purchases. Affiliate disclosure.

    Contact & official info

    Questions about Johnston Lake

    How big is Johnston Lake?

    Johnston Lake covers about 10 acres in Mud Lake, Idaho (Jefferson County).

    What towns are on Johnston Lake?

    Johnston Lake touches Mud Lake in Jefferson County, Idaho.

    Share a tip or fishing report

    Know Johnston Lake? 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 Mud Lake