DateExpected
Early September 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Spearfish City Park, Spearfish, South Dakota
Spearfish, Lawrence County
Countdown
September
A 50-mile mountain bike loop out of Spearfish City Park, ridden counterclockwise in 2027. Big day, but 1,829 m over 80 km is steady rather than savage.
Key facts
01E-bikes are banned under USFS regulations
02Lollipop loop: you ride out, circle, and return the same way
03Results split by sex, age group, team size and bike type
Create a free training plan for the Dakota Five-O
7-day free trial, no card required
The course
The route
Spearfish
Distance80km
Total climb1,829m
StartElevation
0 kmDrag map to rotate70.0 km
Weather
Early-September, Spearfish
28°CTypical high
12°CTypical low
-3°CColdest in 20 years
21%Days with rain
Highs around 28°C and lows around 12°C, but it has dropped to -3°C. Rain on 21% of days. Pack for the cold end, not the average.
NASA POWER data, 2006-2025, the week either side of race day
Results
Course verified. Results not yet available.
Organiser
Training
Training for the Dakota Five-O
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Dakota Five-O plan targets
Typical sessions
80 km with 1,829 m of climbing
Endurance and fatigue resistance over the full distance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long endurance rides building toward the full distance
Threshold and sweet-spot work for sustained power
Sustained climbing repeats on real gradients
Terrain and skills practice specific to the course
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Dakota Five-O plan.
7-day free trial, no card required.
More events in September in United States
Bighorn RoadExpected Early September 2027 · Gypsum→Booneville Backroads UltraExpected Early September 2027 · Iowa→Booneville Backroads UltraExpected Early September 2027 · Iowa→Catskill Mountain Cycling ChallengeExpected Early September 2027 · Arkville→Cherry Hill Farm UltraExpected Early September 2027 · Gorham→Down For Gravel / DFGExpected Early September 2027 · Newfield→
