United StatesSouth Dakota O'Neil Pass
O'Neil Pass Bike Climb - PJAMM Cycling

2.8
FIETS
29.6 mi
DISTANCE
3,096 ft
GAINED
1.9 %
AVG. GRADE
FULL CLIMB STATS
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The longest and highest bike climb in South Dakota. 

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CLIMB SUMMARY

The longest climb in South Dakota - O’Neil Pass

Ride 29.6 miles gaining 3,096’ at 1.9% average grade (2.4% climb only)

This climb is on a state highway its entire distance - first on 14A for 17.4 miles at 1.7% then 12.2 miles at 2.2% after turning onto Hwy 85 at Cheyenne Crossing.  This is certainly not a challenging climb and is not extraordinarily scenic while riding on the state highway, but it is long and a relatively continuous “climb.”  The steepest ½ mile is 7.4% in the last mile of the ride.

Beginning in Spearfish, this climb is through Black Hills National Forest (1,253,308 acres established in 1897).

 

 

Cheyenne Crossing at 17.4 - Restaurant

4.5 Google Review

This climb shares its first 17.4 miles with the Spearfish Canyon Climb which veers left at Cheyenne Crossing while O’Neil Pass veers right.

Sobering signage just below the finish.

Mile 25.

Flandrequ Santee Sioux Reservation was established in 1934 and is 2,500 acres.

You are now at the highest point on a paved public roadway in South Dakota.