Northwest Corner
- 5.5
- grade
- Trad Gear
- style
- Apr–Oct
- best months
One of the easier climbs catalogued at Twin Sisters, where the grade span runs from 5.5 to 5.10a across 17 routes.
- Nearby · D: Open Bible · C: Sun Buttress · H: Indian Head
Best time to go · Apr–Oct
Best time to visit Northwest Corner
Best months: April–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
31° / 11°
9 wet
Feb
35° / 14°
8 wet
Mar
48° / 26°
9 wet
Apr
61° / 36°
11 wet
May
72° / 47°
12 wet
Jun
82° / 57°
11 wet
Jul
85° / 60°
9 wet
Aug
83° / 58°
9 wet
Sep
77° / 50°
8 wet
Oct
64° / 38°
9 wet
Nov
48° / 27°
8 wet
Dec
36° / 17°
9 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Mt Carroll, IL, 9 mi away at 640 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
Photo of the crag
Keep exploring — more climbs worth the drive
Photo: Eric Schmuttenmaer from Downers Grove, USA, CC BY-SA 2.0 (via Wikimedia Commons)D: Open Bible
Next door
D: Open Bible in Illinois has 9 traditional climbing routes across 6 grades.
Photo: Eric Schmuttenmaer from Downers Grove, USA, CC BY-SA 2.0 (via Wikimedia Commons)C: Sun Buttress
Next door
C: Sun Buttress in Illinois has 12 traditional climbing routes across 7 grades.
CLIMB
H: Indian Head
Next door
H: Indian Head is a climbing area in Illinois with 5 routes.
CLIMB
I: Bee Wall
Next door
I: Bee Wall in Illinois has 15 climbing routes with 8 difficulty grades.
CLIMB
B: Forgotten Wall
Next door
B: Forgotten Wall in Illinois has 19 trad climbing routes across 9 difficulty grades.
CLIMB
A: Sentinel
Next door
A: Sentinel in Illinois has 32 climbing routes with 16 distinct difficulty grades.
CLIMB
J: Amphitheater Wall
Next door
J: Amphitheater Wall in Illinois has 8 trad routes across 6 difficulty grades.
CLIMB
K: Butter Walls
Next door
K: Butter Walls is a climbing crag in Illinois with 6 routes.
CLIMB
Mississippi Palisades
~1 min drive
Mississippi Palisades is a climbing area in Illinois with 1 route.
CLIMB
L: Dihedrals Area
~2 min drive
7 trad routes on sandstone in Illinois.
