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RIVERBETA · field sheet

Johnsrud Park to Weigh Station

Blackfoot River
ClassI-II
Length10.6 mi
Gradient
On-water≈ 3 hrs
SeasonMay–September
FlowGO
USGS 12340000 · Blackfoot River near Bonner, MT
952cfs
steady over 24h · gauge 2.55 ft · water 65°F
46th percentile — about normal for the date · median ~1,000 cfs
Prime range 500–5,000 cfs
Flow at put-in today: cfs
On the water
Patchy Smoke · Thursday
Water65°F
Air91°F
Precip2%
Wind2 to 8 mph WSW
Sunrise6:13 AM
Sunset9:11 PM

GO Running well at 952 CFS. · Conditions as of Jul 30, 2026, 5:30 AM. Printed snapshot generated Jul 30, 2026, 6:21 AM— conditions change, wood moves, levels swing. Verify the gauge and scout anything you can't read from upstream.

The run

Missoula's summer float — the mellow lower canyon from the Johnsrud beach scene down to Bonner. Easy Class I-II water that becomes the region's tubing mecca as flows drop.

Johnsrud Park to Weigh Station river map
Pput-in · Johnsrud ParkTtake-out · Weigh Station

Getting there & back

Put-in

Johnsrud ParkThe largest site on the river and the downstream end of the Recreation Corridor — concrete ramp, drinking water, toilets, and a reservable group picnic shelter (406-542-5500). Day use; closed in winter. On hot summer days it is a full-on beach scene, and the take-out gets very busy.

Take-out

Weigh StationConcrete ramp and vault toilet half a mile east of Bonner — the last reliable take-out on the river. The short reach below, down to the I-90 bridges, was temporarily closed to all use in August 2025 for BNSF railroad-bridge repairs and that work is expected to resume mid-summer 2026; check FWP's current closures before planning to continue toward Milltown.

Shuttle (take-out → put-in): 10.4 mi · ≈ 13 min

Trip log

Date
Party / boats
On the water
Off the water
Flow at launch
Shuttle / keys
Wood, hazards & notes

Spot wood or a changed rapid? Add it to the run page when you're back in coverage — riverbeta.app/blackfoot-river/blackfoot-johnsrud-to-weigh-station — the next crew is counting on you.