Minnesota · Rock climbing · Sandstone

Sigma

One of six routes catalogued at Sigma Wall, this climb sits in the middle of the crag's range from 5.9 to 5.13b. First ascent by Mike Dahlberg.

Also worth it near here
- Wolf Creek FallsWaterfall · ~1 min drive
- Kettle River State Water TrailCanoeing · ~7 min drive
- Little Mud LakeLake fishing · ~18 min drive
- Maple IslandBoat launch · ~24 min drive
Best time to visit Sigma
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
  20° / 2°
  9 wet
2. Feb
  26° / 6°
  8 wet
3. Mar
  38° / 18°
  9 wet
4. Apr
  52° / 30°
  10 wet
5. May
  66° / 41°
  12 wet
6. Jun
  75° / 52°
  11 wet
7. Jul
  79° / 56°
  10 wet
8. Aug
  77° / 54°
  10 wet
9. Sep
  69° / 46°
  10 wet
10. Oct
  55° / 35°
  11 wet
11. Nov
  38° / 22°
  10 wet
12. Dec
  25° / 10°
  10 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Sandstone 6 W, MN, 6.6 mi away at 1,130 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Best time to visit Sigma