Mines Of Spain 100 - Dubuque, IA

Dubuque, United States • 16 Oct 2026

Mines of Spain 100 - Dubuque, IA

The Mines of Spain 100 is a trail running event held at Louis Murphy Park and the Mines of Spain Recreation Area near Dubuque, Iowa. The event offers two distances on a marked loop course of about 20 miles that is repeated for the full distance. Terrain includes dirt, grass, rock and short stretches of pavement, with sections ranging from steep and technical to flat single track and rolling grassy trail. The course passes Horseshoe Bluff and offers multiple vantage points of the Mississippi River, prairies and hardwood forests.

Elevation is approximately 2,800 ft per loop, totaling about 14,000 ft for the 100 mile distance and about 8,400 ft for the 100 kilometer distance. Time limits are set at 33 hours for the 100 mile race and 23 hours for the 100 kilometer race. Packet pickup and a prerace gathering are scheduled the evening before the race, with additional packet pickup the morning of the race; park access is restricted to race staff and volunteers before the morning pickup.

Registration has a closing date of October 1. The event publishes refund and deferral deadlines; deferral and refund requests must be made in writing and receive confirmation. No bib transfers are allowed. When capacity is reached, a public waitlist is maintained and invited runners are given a limited time window to accept. Mile 90 Photography will provide event photos free to runners. The race is part of the No Coast Trail Series. Visit the organization's website for the most recent information.

  • 100 Mile : 5 loops, ~14,000 ft elevation gain
  • 100 Kilometer : 3 loops, ~8,400 ft elevation gain

Race information

100 mi
100 Miler
100 km
100k
Visit the organization's website for the most recent information.
Trail runs nearby

Experience the natural beauty of Dubuque with trail races through the Mines of Spain Recreation Area. Enjoy distances ranging from 4 miles to a half marathon followed by a post race party with brick oven pizza and local beer.

Trail race at Swiss Valley Nature Preserve in Peosta, IA on October 3, 2026, offering 5.2 mile, 25K and 50K multi loop courses with creek crossings and steep rugged terrain. Free camping, showers and shuttle service are provided.

Miner 49er in Dubuque offers 25K and 50K out and back trail courses through the Mines of Spain with significant elevation gain and three aid stations. The course includes single track, stone steps, stream crossings, and river views.

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