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RIVERBETA · pocket sheet

Scotty Brown Bridge to Johnsrud Park

Blackfoot River · II-III · 31.6 mi · 15 ft/mi · ≈10 hrs · May–September
NO858 cfs
steady over 24h · water 63°F
prime 1,500–6,000 cfs
sunset 9:06 PM

Mile by mile

  • 1Bear Creek RapidsII · RM 36Class II on the FWP float map, just upstream of the Bear Creek Flats float-in campsite.
  • 2Roundup RapidIII · RM 29.2At the Highway 200 bridge by the Roundup access — 'a fun rapid that ranges from a bit technical to rowdy wave trains depending on flow' (American Whitewater). Easily scouted from Highway 200.
  • 3Thibodeau RapidII-III · RM 17About two miles below Whitaker Bridge — watch for the large rock right-center as the river drops (American Whitewater). Big Sky Fishing calls it the Blackfoot's best-known piece of whitewater with the safest route on the right; FWP's float map grades it Class II. Flow-dependent.
  • 4The LedgeII · RM 12.8A surf wave a quarter mile above Johnsrud that comes in when spring water is up — parking directly above and across the road, popular for park-and-play laps (American Whitewater).
Field notes
Scotty Brown Bridge to Johnsrud Park river map
P Scotty Brown BridgeT Johnsrud Parkshuttle 28.9 mi · ≈33 min
Last 7 days · USGS 123400001,015918797987MONWEDFRIMON

USGS 12340000 · Conditions as of Aug 3, 2026, 4:30 AM · Areas Of Smoke, 73°F. Printed Aug 3, 2026, 5:52 AM— levels swing, wood moves. Verify the gauge and scout anything you can't read from upstream.