South Dakota is a wonderful state to visit and not bad for cycling either 👍. The Top 3 hardest bike climbs in South Dakota are:
SOUTH DAKOTA #1 TERRY PEAK
Cycling Terry Peak Summit Road - the hardest bike climb in South Dakota.
Ride 6.1 miles gaining 1,539’ at 4.4% average grade (5.5% climb only).
Gravel for the last 3.2 miles - the last 9/10’s of a mile averages 8.3%.
Manageable but we recommend 30mm+ tires.
SOUTH DAKOTA #2 O’NEIL PASS
Ride 29.6 miles gaining 3,096’ at 1.9% average grade (2.4% climb only).
SOUTH DAKOTA #3 SPEARFISH CANYON
Cycling Spearfish Canyon
Ride 20.3 miles gaining 2,518’ at 2.3% average grade
The climb begins in the historic mining town of Spearfish and ascends into the magnificent Spearfish Canyon, ending just beyond Cheyenne Crossing.
Spearfish and O’neil Pass share their first 17.4 miles with each other.
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