Mountain · 1 route

Prospect Peak

6,541 ft · Montana

Summit
6,541 ft
Routes
1 way up
Season
Year-round

Route up Prospect Peak

  1. Prospect PeakModerateabout 579 ft of climbing4.1 mi round tripSee the route
Map of the route up Prospect Peak, with each route's start numbered and the summit marked
Prospect PeakMap © Mapbox © OpenStreetMap contributors

About Prospect Peak

Prospect Peak is a summit of 6,541 feet in the Judith-Musselshell Ranger District of Helena-Lewis and Clark National Forest in Montana. The nearest town is Geyser, about 13 miles away. Summer is the most comfortable time to go. Typical averages from a nearby weather station show July and August highs around 81°F with lows near 47°F, and the peak sits higher than that station, so expect cooler temperatures on top. Shonkin Creek is the closest nearby hike, about 2 miles away, and Thain Creek Campground is about 4 miles off. Highwoods Environmental Ed and Deer Creek are both within about 4.5 miles.

Forecast on Prospect Peak

Daily highs and lows, wind and the chance of precipitation at the summit and route start for the next 7 days, from the Open-Meteo model.

Questions about Prospect Peak

How tall is Prospect Peak?

6,541 ft (1,994 m).

How many routes go to the summit of Prospect Peak?

One: Prospect Peak.

When is the best time to climb Prospect Peak?

Year-round.

Mountains nearby

More mountains in Montana

Facts about this place

When to go

Best time to go: May–Sep. The mildest months here, with typical highs of 63–81°F and lows of 35–47°F.

Typical monthly averages (not a forecast) from the Neihart 8 Nnw, MT weather station, 31 mi away. High / low in °F.

  1. Jan37° high16° low
  2. Feb40° high16° low
  3. Mar46° high22° low
  4. Apr54° high27° low
  5. May63° high35° low
  6. Jun71° high42° low
  7. Jul81° high47° low
  8. Aug81° high47° low
  9. Sep72° high40° low
  10. Oct58° high32° low
  11. Nov44° high24° low
  12. Dec37° high16° low

The station sits about 1,300 ft lower than this spot, so expect it to run cooler up here.

Source: NOAA NCEI U.S. Climate Normals 1991–2020

Where it is

Nearest town
Geyser, Montana · 13 mi

Source: USFS EDW boundaries; USGS GNIS populated places

Conditions

Active alerts for Helena-Lewis and Clark National Forest as of Oct 9, 2026:

Source: USFS forest alerts

Nearby

Source: Roamze catalog (indexable pages within 10 miles, PostGIS distance)

Is Prospect Peak open right now?

No closures listed

The Forest Service lists no closures for Helena-Lewis and Clark National Forest.

As of · Source: USFS · Helena-Lewis and Clark National Forest. Agencies don't list every closure — check before you go.

Best time to visit Prospect Peak

Best months: May–October. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.

  1. Jan

    37° / 16°

  2. Feb

    40° / 16°

  3. Mar

    46° / 22°

  4. Apr

    54° / 27°

  5. May

    63° / 35°

  6. Jun

    71° / 42°

  7. Jul

    81° / 47°

  8. Aug

    81° / 47°

  9. Sep

    72° / 40°

  10. Oct

    58° / 32°

  11. Nov

    44° / 24°

  12. Dec

    37° / 16°

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Neihart 8 Nnw, MT, 31.4 mi away at 5,230 ft. The station sits about 1,300 ft lower than this place, so expect it a little cooler here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.