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© 2026 Barbless.co. Flow and gauge data from USGS; weather from Open-Meteo. · v2026.10.18.2

  1. Idaho
  2. Rivers & Lakes
  3. Thomas Fork Bear River

Updated September 2, 2026

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Idaho Rivers › Eastern Idaho

Thomas Fork Bear River

Premier Idaho trout water with diverse seasonal hatches.

Recommended water31 mi · 50 kmFreestone RiverTrout fishery
View on MapGet Directions
Brown troutCutthroat troutRainbow troutMountain whitefish

A Legendary Idaho Fishery

Bear River tributary in Bear Lake County (~30.7 mi). IDFG recommended fly water.

Sources: idfg.idaho.gov

Best Season

May – October

River Type

Freestone

Skill Level

Beginner – Intermediate

Best Techniques

Dry Flies, Nymphing

Access

Moderate

Gauge stations along the Thomas Fork Bear River

Access

Fish in Thomas Fork Bear River

Explore fish species associated with the Thomas Fork Bear River. Each profile includes identification tips, habitat notes, and practical fishing guidance for Idaho anglers.

Hatches on Thomas Fork Bear River

Review seasonal insect hatches on the Thomas Fork Bear River, including timing windows and fly pattern suggestions for Idaho fly fishing.

Regulations

Check current seasons, limits, and special rules for Thomas Fork Bear River before you go. Regulations change, so always verify with IDFG.

View IDFG Regulations

Guides & Outfitters

Recent conditions on Thomas Fork Bear River

The latest fishing conditions and hatch notes for Thomas Fork Bear River. Older reports live in the Thomas Fork Bear River report archive.

Videos on Thomas Fork Bear River

These YouTube videos have been hand-curated by our team because we feel they best represent the Thomas Fork Bear River fishery. Watch for river character, access context, and techniques that translate to your next Idaho trip.

Photos

Nearby Communities

  • Geneva3.8 mi
  • Alton6.8 mi
  • Wardboro11.2 mi
  • Dingle11.8 mi
  • Montpelier11.8 mi
  • Bennington14.3 mi

On this page

Overview
Flows
Live camerasAccessFishHatchesRegulationsGuides & OutfittersVideosPhotosNearby CommunitiesReaches

River Tools

  • View on Map
  • Get Directions

Map data © Mapbox © OpenStreetMap

Fish in Thomas Fork Bear River

The Thomas Fork Bear River supports 4 fish species in our Idaho fishing catalog. Browse each profile for identification tips, seasonal patterns, and how these species are managed on this water.

  • Brown Trout
    Brown TroutWary, hard-fighting trout that reward careful presentations and can grow into true fish-eaters.
  • Cutthroat Trout
    Cutthroat TroutIdaho’s native trout, built for cold streams and lakes and famous for rising to a well-drifted fly.
  • Mountain Whitefish
    Mountain WhitefishA native coldwater scrapper that shines on nymphs when trout fishing slows down.
  • Rainbow Trout
    Rainbow TroutIdaho’s most widespread trout, quick to rise and willing to chase nymphs and small streamers.

Other reaches in the Bear River

10 reaches
  • Bear River, Alexander Reservoir to Eightmile Road Bridge

    Mixed warm-water93 mi · 149 km
  • Bear River, Bear Lake Outlet to WY State Line

    Mixed warm-water93 mi · 150 km
  • Bear River, Cove Plant to Grace Dam

    Mixed warm-water68 mi · 110 km
  • Bear River, Eightmile Road Bridge to Georgetown

    Mixed warm-water66 mi · 106 km
  • Bear River, Georgetown to Bear Lake Outlet

    Mixed warm-water61 mi · 99 km
  • Bear River, Grace Dam to Last Chance Dam

    Mixed warm-water86 mi · 138 km
  • Bear River, Last Chance Dam to Alexander Dam

    Mixed warm-water82 mi · 132 km
  • Bear River, Oneida Narrows Dam to Cove Plant

    Mixed warm-water45 mi · 72 km
  • Bear River, Preston to Riverdale

    Mixed warm-water80 mi · 128 km
  • Bear River, Riverdale to Oneida Narrows Dam

    Mixed warm-water55 mi · 88 km

Videos on Thomas Fork Bear River

These YouTube videos have been hand-curated by our team because we feel they best represent the Thomas Fork Bear River fishery. Watch for river character, access context, and techniques that translate to your next Idaho trip.

No videos
No related videos yet.

Guides & Outfitters

Fishing guides, outfitters, shuttles, and shops that operate on the Thomas Fork Bear River.

No verified providers for this river yet. Browse the full directory.

Hatches on Thomas Fork Bear River

Review seasonal insect hatches on the Thomas Fork Bear River, including timing windows and fly pattern suggestions for Idaho fly fishing.

We don't have a hatch chart for this water yet. These are the hatches common on Idaho trout water this season, not a record of this river.

Likely hatching

  • Blue-winged olives / Baetis
  • October caddis
  • Mahogany duns
  • Streamer bite

Recommended flies

  • BWO
  • October Caddis
  • Soft hackle
  • Streamer

Access

No access sites yet
No mapped access sites along this river yet.