Mountain · 1 route

Phantom Hill

6,570 ft · Idaho

Summit
6,570 ft
Routes
1 way up

Route up Phantom Hill

  1. SOUTH BOULDER LOOPEasyabout 249 ft of climbing2.3 miSee the route
Map of the route up Phantom Hill, with each route's start numbered and the summit marked
SOUTH BOULDER LOOPMap © Mapbox © OpenStreetMap contributors

About Phantom Hill

Phantom Hill is a summit of 6,570 feet in the Sawtooth National Recreation Area, part of the Sawtooth National Forest in Idaho. The nearest town is Ketchum, about 9 miles away. Summer is the most comfortable time to go. Typical averages from a nearby weather station in Ketchum show July highs around 80°F with lows near 45°F, and September highs near 69°F. That station sits roughly 700 feet below the summit, so temperatures up top run cooler. The South Boulder Loop hike starts less than a mile away, and the Wood River Group Overnight Area (tent only) and Wood River Campground are both about 2 miles off. For fishing, the Sawtooth National Recreation Area lakes are about 4 miles away.

Forecast on Phantom Hill

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 Phantom Hill

How tall is Phantom Hill?

6,570 ft (2,003 m).

How many routes go to the summit of Phantom Hill?

One: SOUTH BOULDER LOOP.

Mountains nearby

More mountains in Idaho

Facts about this place

When to go

Best time to go: May–Sep. The mildest months here, with typical highs of 62–80°F and lows of 35–45°F.

Typical monthly averages (not a forecast) from the Ketchum Rs, ID weather station, 9.8 mi away. High / low in °F, and days with snow.

  1. Jan31° high8° low9 days with snow
  2. Feb35° high11° low7 days with snow
  3. Mar43° high19° low5 days with snow
  4. Apr52° high27° low2 days with snow
  5. May62° high35° low
  6. Jun70° high40° low
  7. Jul80° high45° low
  8. Aug79° high43° low
  9. Sep69° high36° low
  10. Oct56° high28° low1 days with snow
  11. Nov41° high17° low4 days with snow
  12. Dec30° high9° low9 days with snow

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

Where it is

Nearest town
Ketchum, Idaho · 9.2 mi

Source: USFS EDW boundaries; USGS GNIS populated places

Conditions

Active alerts for Sawtooth National Forest as of Oct 9, 2026:

Source: USFS forest alerts

Nearby

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

Is Phantom Hill open right now?

Alert in the area

The Forest Service lists 4 alerts for Sawtooth National Forest.

As of · Source: USFS · Sawtooth National Forest. Agencies don't list every closure — check before you go.

Best time to visit Phantom Hill

Best months: May–September. 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

    31° / 8°

    10 wet · 9 snow

  2. Feb

    35° / 11°

    9 wet · 7 snow

  3. Mar

    43° / 19°

    8 wet · 5 snow

  4. Apr

    52° / 27°

    7 wet · 2 snow

  5. May

    62° / 35°

    8 wet

  6. Jun

    70° / 40°

    7 wet

  7. Jul

    80° / 45°

    5 wet

  8. Aug

    79° / 43°

    4 wet

  9. Sep

    69° / 36°

    4 wet

  10. Oct

    56° / 28°

    5 wet · 1 snow

  11. Nov

    41° / 17°

    7 wet · 4 snow

  12. Dec

    30° / 9°

    10 wet · 9 snow

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Ketchum Rs, ID, 9.8 mi away at 5,890 ft. The station sits about 700 ft lower than this place, so expect it a little cooler here. Source: NOAA NCEI U.S. Climate Normals 1991–2020.