FloatETA estimates how long this float actually takes from live discharge at USGS 06043120 (Gallatin above Deer Creek nr Big Sky), not a guidebook average. At a typical 900 cfs, a raft drifts about 5.2 mph here. Higher flow speeds you up; skinny water slows you down. Kayaks run faster than the current, tubes slower. Optional fishing adds 35 minutes per mile.
The Gallatin River (Canyon) listing covers 9 river miles across 1 access-to-access stretch (Class III–IV). Times in the table are typical raft hours at that reference flow. Open the live calculator for today's CFS, sunset take-out, water temperature, and rain/UV at the put-in.
See today's Gallatin River (Canyon) float time
Float stretches on the Gallatin River (Canyon)
| Put-in → take-out | Miles | Difficulty | Typical raft time | Notes |
|---|---|---|---|---|
| Greek Creek → Storm Castle | 9 mi | Class III–IV | ~1 hr 44 min | Screaming Left, House Rock, Mad Mile. Not a tube or beginner run. Commercial rafting water. |
How we time this river
Speed scales with discharge using hydraulic geometry v ∝ Q0.34, calibrated to this gauge. That is why a 1,000 cfs afternoon is a different day than 3,000 cfs runoff. Always scout, wear a PFD, and check Montana FWP boating for closures. Gauge page: USGS 06043120.
Common questions
How long does it take to float Greek Creek to Storm Castle on the Gallatin River (Canyon)?
About 1 hr 44 min in a raft at a typical 900 cfs. Kayaks run a bit faster; tubes run slower. Stopping to fish adds about 35 minutes per mile. Screaming Left, House Rock, Mad Mile. Not a tube or beginner run. Commercial rafting water.
What USGS gauge is used for Gallatin River (Canyon) float times?
FloatETA uses USGS gauge 06043120 (Gallatin above Deer Creek nr Big Sky) for live discharge. Speed is scaled from a reference 900 cfs drift of about 5.2 mph.
Is the Gallatin River (Canyon) a good tube float?
Tubes lag the current (we use a 0.72× speed multiplier). This listing includes Class III or harder water — rafts and experienced paddlers, not tubes.