Mines Of Spain 100 - Dubuque, IA
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Mines of Spain 100 - Dubuque, IA
The Mines of Spain 100 is a multi-loop trail ultramarathon held October 16, 2026 in Louis Murphy Park and the Mines of Spain Recreation Area near Dubuque, Iowa. The event offers two distances and is organized by Sun Trail Running.
The course is a marked loop of roughly 20 miles that starts and finishes at Louis Murphy Park and spends most miles on dirt, grass and rock trails in the driftless region. Each loop includes short pavement sections at the beginning and end to connect segments. Trails vary from steep and technical to flat dirt single track and rolling grassy sections. Runners pass viewpoints of the Mississippi River, traverse around Horseshoe Bluff, and move through prairie and hardwood forest terrain. Elevation gain is about 2,800 ft per loop.
- 100 mile: five ~20 mile loops, ~14,000 ft total elevation
- 100 kilometer: three ~20 mile loops, ~8,400 ft total elevation
The event lists time limits for each distance and maintains a race schedule with packet pickup and prerace gatherings at Louis Murphy Park. Registration closes on October 1 and the race uses a public waitlist when capacity is reached. The refund and deferral policy specifies deadlines, percentage refunds or deferral credits, and that bib transfers are not allowed. Event photography will be provided for runners and the race is a member of the No Coast Trail Series. Visit the organization's website for the most recent information.
