The Mines of Spain 100 is a premier ultramarathon trail event held on October 17–18, 2025, in Dubuque, Iowa, offering two race distances: 100 miles and 100 kilometres. Set within the rugged and scenic Mines of Spain Recreation Area, the course consists of approximately 20-mile loops featuring steep, technical single track, prairie double track, and minimal pavement. The 100-mile race includes five loops (with about 14,000 ft of total elevation gain), while the 100K covers three loops (~8,400 ft elevation gain), pushing even seasoned trail runners to their limits. Organised by Sun Trail Running, the event is known for its strong community spirit, well-supported aid stations, and unique finisher awards. It also supports local trail development and conservation, making it both a personal challenge and a contribution to the trail-running community.
Races
100 miles
100 km
Race Date:
17 October, 2025
The Mines of Spain 100 Mile is an ultramarathon trail race taking place on October 17–18, 2025, in Dubuque, Iowa, set within the rugged and scenic Mines of Spain Recreation Area. Covering five demanding 20-mile loops with a total elevation gain of approximately 14,000 feet, the race challenges runners with steep climbs, technical single track, and diverse terrain.
Weather based on historical averages.
FAQs
What is the Mines of Spain 100 Mile?
How long is the Mines of Spain 100 Mile?
Where does the Mines of Spain 100 Mile take place?
What is the elevation gain of the Mines of Spain 100 Mile?
How can I prepare for the Mines of Spain 100 Mile?
How do I choose the right training plan for the Mines of Spain 100 Mile?
The Mines of Spain 100 Mile is an ultramarathon trail race taking place on October 17–18, 2025, in Dubuque, Iowa, set within the rugged and scenic Mines of Spain Recreation Area. Covering five demanding 20-mile loops with a total elevation gain of approximately 14,000 feet, the race challenges runners with steep climbs, technical single track, and diverse terrain.
The Mines of Spain 100 Mile is 161km long.
The Mines of Spain 100 Mile takes place in Dubuque, Iowa, USA.
The Mines of Spain 100 Mile elevation gain is 4267 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Mines of Spain 100 Mile?
The Mines of Spain 100 Mile is an ultramarathon trail race taking place on October 17–18, 2025, in Dubuque, Iowa, set within the rugged and scenic Mines of Spain Recreation Area. Covering five demanding 20-mile loops with a total elevation gain of approximately 14,000 feet, the race challenges runners with steep climbs, technical single track, and diverse terrain.
How long is the Mines of Spain 100 Mile?
The Mines of Spain 100 Mile is 161km long.
Where does the Mines of Spain 100 Mile take place?
The Mines of Spain 100 Mile takes place in Dubuque, Iowa, USA.
What is the elevation gain of the Mines of Spain 100 Mile?
The Mines of Spain 100 Mile elevation gain is 4267 meters, which Runna classifies as a Hilly race.
How can I prepare for the Mines of Spain 100 Mile?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Mines of Spain 100 Mile?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
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Sport:
Running
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Mines of Spain 100 2025 or Sun Trail Running. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Mines of Spain 100 2025 website.
