Sundance to Spearfish Marathon
Race Day Weather
Cool start, warming trend
Runners will face a temperature rise from 48°F at the start to a peak of 67°F. Wind will come from the WSW at 7 mph, with gusts reaching 19 mph, creating a mild headwind effect. With average humidity at 53%, hydration is recommended, especially as temperatures climb, adjusting pace accordingly.
Pace Calculator
Get forecast alerts for Sundance to Spearfish Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Sundance to Spearfish Marathon offers runners a predominantly downhill course through the scenic Black Hills, starting in Wyoming and finishing in South Dakota. The first 12 miles feature improved gravel roads winding through mountain meadows, valleys, and canyons, with a notable descent of 1,606 feet and a pass by the "Dances with Wolves" film site at mile 9.35. The final 14 miles are on paved roads, descending Spearfish Canyon Highway into Spearfish, with an additional drop of 1,364 feet. This USATF-certified course is ideal for those aiming to qualify for the Boston Marathon, as it is one of only two such courses in Wyoming and South Dakota.
