Sigma Wall
- 6 routes
- 5.9 – 5.13b
- Sport · Trad · Mixed
- May–Oct
- best months
Sigma Wall is a climbing area in Minnesota, about half a mile from the town of Sandstone. It sits among a cluster of other climbing spots, so it works well as one stop in a day of exploring the surrounding crags. Summer is the most comfortable time to visit. Typical averages from a nearby weather station show July highs around 79°F with lows near 56°F, while January highs average only about 20°F. Several climbing areas lie right next door. Diagonals Wall, Sax Wall and Main Flow Area are each about 0.1 mile away, and Robinson Park Bouldering is about 0.3 mile off. For time on the water, the Kettle River State Water Trail is about 4 miles away.
- Diagonals WallRock climbing0.1 mi
- Sax WallRock climbing0.1 mi
- Main Flow AreaRock climbing0.1 mi
- Relationship WallRock climbing0.2 mi
- Robinson Park BoulderingRock climbing0.3 mi
- EldonRock climbing0.3 mi
- The Lost Boys BouldersRock climbing0.5 mi
- Kettle River State Water TrailCanoeing4.2 mi
Source: Roamze catalog (indexable pages within 10 miles, PostGIS distance)
Best time to visit Sigma Wall
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.
Jan
20° / 2°
9 wet
Feb
26° / 6°
8 wet
Mar
38° / 18°
9 wet
Apr
52° / 30°
10 wet
May
66° / 41°
12 wet
Jun
75° / 52°
11 wet
Jul
79° / 56°
10 wet
Aug
77° / 54°
10 wet
Sep
69° / 46°
10 wet
Oct
55° / 35°
11 wet
Nov
38° / 22°
10 wet
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.
