Old Us Highway 91 Cascade County boat launch
Old Us Highway 91 Cascade County
This boat ramp services the Missouri River, which is a major waterway in Montana. It is a popular destination for recreational boating, fishing, and other water activities. The Missouri River also provides an important source of water for irrigation and other uses.
According to the Montana Fish, Wildlife & Parks website, all types of watercraft are allowed on the Missouri River, including motorboats, sailboats, kayaks, canoes, and stand-up paddleboards. However, boaters should be aware of the river's changing water levels, strong currents, and potential hazards such as rocks and logs.
Overall, the Old US Highway 91 boat ramp is a convenient and well-maintained access point for boaters looking to enjoy the Missouri River in Cascade County, Montana.
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 Old Us Highway 91 Cascade County -- the same readings that determine whether your launch is safe and your boat is the right craft.
| Streamgauge | Discharge | View |
|---|---|---|
| Missouri River At Cascade Mt | 3,530 cfs | → |
| Smith River Near Eden Mt | 434 cfs | → |
| Missouri River Near Ulm Mt | 4,040 cfs | → |
| Sun River Near Vaughn Mt | 1,120 cfs | → |
| Sun River At Simms Mt | 1,030 cfs | → |
| Dearborn River Near Craig Mt | 174 cfs | → |
Plan a longer trip
The closest paddle runs, fishing spots, and other boat launches so you can extend a day on the water.
River runs
- Tenderfoot Creek, Sec. 30, T14n, R4e To Deep Creek, Sec. 31, T16n, R4e
- Falls, Sec. 25, T14n, R4e To Smith River, Sec. 25, T14n, R3e
- Missouri River
- Hauser Dam, Sec. 29, T12n, R2w To Cochran Gulch, Sec. 18, T12n, R2w
- Town Of Nelson, Sec. 12, T12n, R2w To Missouri River, Sec. 19, T12n, R2w
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 Old Us Highway 91 Cascade County as a favorite, set a discharge threshold or a wind/precipitation alert, and the iOS app will push the moment conditions cross.
About Old Us Highway 91 Cascade 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 Old Us Highway 91 Cascade County.