Discover the Mines of Spain 100, a captivating ultra-marathon nestled in the picturesque bluffs, prairies, and forests of Dubuque, Iowa's "driftless region." On October 16, 2026, runners can challenge themselves with either the 100-mile or 100-kilometer distance, traversing a diverse ~20-mile looped course that truly embodies a Midwest trail race experience. Starting and finishing at Louis Murphy Park, the route quickly immerses participants in the expansive Mines of Spain Recreation Area, renowned for its challenging blend of steep, technical singletrack, rolling dirt paths, and grassy doubletrack. With approximately 14,000 feet of elevation gain for the 100-miler (five loops) and 8,400 feet for the 100K (three loops), the course promises to test both novices and seasoned ultrarunners alike. Expect breathtaking views of the Mighty Mississippi River, the iconic Horseshoe Bluff, and panoramic vistas of hardwood forests and prairies, with historic sites like the Julien Dubuque Monument adding to the unique scenery.

The Mines of Spain 100 is celebrated not just for its demanding course, but also for its grassroots feel and meticulous organization. Aid stations, strategically placed five times per loop with a maximum distance of 6.3 miles between them, are fully stocked with water, Tailwind, soda, a variety of snacks, and even hot and cold food, including pulled pork sandwiches. Drop bag service is available at all four aid stations, ensuring runners have access to personal supplies throughout the event. Louis Murphy Park serves as the central hub, featuring "Crew-ville" where crews can set up support stations, though crew and pacer access is limited to the start/finish and Aid Station #3 at EB Lyons.

Beyond the trails, this race is known for its exceptional community atmosphere, supported by incredibly helpful and top-notch volunteers. Runners frequently praise the positive vibe and strong camaraderie. Typical race day conditions in mid-October often bring pleasant highs around 60°F and lows around 42°F, with a minimal 11% chance of precipitation, offering ideal weather for tackling the varied terrain. As part of the No Coast Trail Series, the Mines of Spain 100 not only provides an unforgettable racing experience but also contributes significantly to the Mines of Spain park for trail maintenance and future projects, making it a race with a lasting impact.