Greycliff Bridge Sweet Grass County boat launch
Greycliff Bridge Sweet Grass County
This boat ramp services the Yellowstone River, which is a popular spot for recreational activities such as boating, fishing, and tubing. The Yellowstone River is the longest undammed river in the United States, and it runs through Wyoming, Montana, and North Dakota.
As per the Montana Fish, Wildlife & Parks website, all types of watercraft are allowed on the Yellowstone River, including motorboats, canoes, kayaks, and rafts. However, boats with motors exceeding 10 horsepower are not allowed on the river during the winter months.
In summary, the Greycliff Bridge Sweet Grass County boat ramp is a concrete ramp that is 14 feet wide, and it services the Yellowstone River in Montana. All types of watercraft, including motorboats, are allowed on the river.
Plan your launch down to the hour
Same weather feed Snoflo's iOS app uses -- updated continuously from NOAA / yr.no.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Area streamflow levels
USGS streamgauges around Greycliff Bridge Sweet Grass County -- the same readings that determine whether your launch is safe and your boat is the right craft.
| Streamgauge | Discharge | View |
|---|---|---|
| Boulder River At Big Timber Mt | 548 cfs | → |
| Stillwater River Near Absarokee Mt | 670 cfs | → |
Plan a longer trip
The closest paddle runs, fishing spots, and other boat launches so you can extend a day on the water.
Boating safety & etiquette
- Check the conditions before you launch
- Use the streamflow numbers, weather, and wind forecast on this page. High-cfs whitewater requires whitewater-specific craft and skill.
- Wear your life jacket
- Statistically the single biggest survival factor in a boating incident. State law often requires one per passenger.
- File a float plan
- Tell someone on shore your put-in, take-out, and expected return time. Especially for multi-day or remote trips.
- Yield at the ramp
- Prep gear in the parking lot, not on the ramp. Launch and clear quickly so others can use the lane.
- Clean, drain, dry
- Inspect, clean, drain and dry your boat between waters to prevent the spread of aquatic invasive species.
Set push alerts in the Snoflo app
Save Greycliff Bridge Sweet Grass County as a favorite, set a discharge threshold or a wind/precipitation alert, and the iOS app will push the moment conditions cross.
About Greycliff Bridge Sweet Grass County
Can I launch a motorboat here?
Most Snoflo-tracked launches support motorboats; check the operator for any horsepower restrictions, paddle-only zones, or seasonal closures.
How fresh is the streamflow data?
USGS streamgauges report continuously (every 15 minutes); the table on this page pulls the latest reading at page load.
Is there a fee?
Many federal and state boat launches charge a day-use fee. Check the operator's site before driving out.
What boat is right for these conditions?
Use the nearby streamflow numbers and river-run panel on this page to gauge current conditions. Wider, slower water is friendly for casual paddling and powerboats; high-cfs whitewater requires whitewater-specific craft and skill.
Can I get alerts when conditions change?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this launch, set a threshold (discharge, wind), and you'll get a push the moment it crosses.
Other launches near here
Snoflo-tracked boat launches within driving distance of Greycliff Bridge Sweet Grass County.