Friday, Oct 18, 2024 @ 8:00 AM

Mines of Spain 100

1700 South Grandview Ave.

Dubuque, IA 100 Miler, 100K

Registration closes: Tue, Oct 1 @ 11:59PM CT

Welcome to the Mines of Spain 100!

This is a true Midwest trail race set in the beautiful bluffs, prairies and forests of the driftless region of eastern Iowa amongst the scenic setting of the Mississippi river valley!

Start Time – (100mi/100k) – 8am
Time Limit – 33 hours (5pm Saturday) for the 100mi and 23 hours (7am Saturday) for the 100k
Elevation Gain – ~2,800ft per loop
100mi – 5 Loops = ~14,000ft
100k – 3 Loops = ~8,400ft

The 100 mile and 100 kilometer races will follow a marked ~20mi course that starts and finishes in Louis Murphy Park but spends most of its miles in the Mines of Spain Recreation Area on the expansive network of dirt, grass and rock trails that run throughout. Each loop contains a couple of short stretches of pavement, primarily at the beginning and end, to help connect the different segments of the course. Runners will be treated to beautiful views of the Mighty Mississippi River from a number of stunning vantage points, a tour through and around the iconic Horseshoe Bluff as well as panoramic vistas of beautiful grass prairies and dense hardwood forests. The trails range from steep & technical to flat dirt single track to rolling & grassy and everything in between. While there are plenty of hills to challenge you at the Mines, there are also ample stretches of trail where you can really open up and find your stride. This is a truly diverse course that is perfect for your 1st hundred or your 100th hundred!

Louis Murphy Park – Start/Finish
4:00pm-8:00pm – Packet pickup and prerace gathering
PLEASE NOTE – No camping or runner setup is allowed Thursday evening

Louis Murphy Park – Start/Finish
6:00am – packet pickup – ONLY race staff and volunteers are allowed into the park before 6am!
8:00am – Race start!

12:00am – 100k 2nd loop cutoff
7:00am – 100k final cutoff
11:00am – 100mi 4th loop cutoff
5:00pm – 100mi final cutoff


Please see for registration details including pricing, deadlines and military veteran/100 mile virgin discounts.

The deadline for guaranteed swag size is a month out from race day.

Partial refunds & deferrals are available if the race is notified in writing ( and the runner receives a reply confirming the request. All deferrals and refunds are a percentage of what was actually PAID at time of registration excluding taxes and fees. Bib transfers are NOT allowed.

The deadline (end of day) to request a refund/deferral is:
100% deferral or 50% refund – June 30
75% deferral - August 31

If a runner becomes pregnant or gives birth after registering for the event, that runner is eligible for a 100% deferral up through the final August 31st deadline listed above. The runner must notify the race in writing ( and receive a reply approving the request. While not required, the race reserves the right to request additional documentation from a physician, registered midwife or other medical professional.

All deferral credits are good for TWO years (2025 or 2026) and are not transferrable to another runner. Please note, any deferred registrant MUST still complete the registration process and a deferral credit can only be used ONCE. If used in the first year available, it can NOT be deferred or used a second time. The deferral credit is a rollover discount of whatever you paid in the year you deferred. The window to register using your rollover credit for 2025 will close January 31st. If you do decide to wait and use it for 2026, the same process will be repeated in January of 2026 at which point you’ll have that month to take advantage of the credit before it expires.
NO refunds after June and NO deferrals after August.
NO bib transfers.

The race reserves the right to modify the course for matters related to runner safety or trail condition concerns or to cancel the race in the case of natural disaster. In situations like these, there will be no refund of registration fees.

Please DO NOT register if any of this is unacceptable to you. Severe Weather Policy

Runners are allowed to switch distance after registration by contacting the race directly. If switching from the 100k to 100mi, you will be required to pay the difference in registration cost. Switching down does not cost anything additional but does not issue any refund. The deadline to switch up to the 100mi is one month out from race day. You are allowed to switch down to the 100k through Thursday night pre-race packet pickup.

When the race reaches capacity, a waitlist will be maintained publicly on ultrasignup (click on Waitlist in the menu at the top of this page) and participants on the waitlist will be invited via email as spots open in the order they signed up. Invited runners will be given 5 days to either accept or decline before their spot is passed on to the next runner. Four weeks out from the event, that window will shorten to 48 hours. Please note that you are charged and your registration finalized ONLY if you accept the waitlist invitation.


The incredible Mile 90 Photography will once again be on site all weekend taking countless photos before, during and after your race, all of which are free to runners and available shortly after race weekend!


Our race is proud to be a part of the No Coast Trail Series. For more details and to sign up for free go to: No Coast Trail Series. Check out all the other member races and help grow trail and ultra running on the No Coast!


Please visit the race website at for all additional event details.

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Event's current local time: 2:17 PM CT


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