Registration is CLOSED - RACE DAY REGISTRATION IS AVAILABLE 9 am to 11:30 am

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Dirty Thirty Ultra XC Mountain Bike Race (15 or 30 mile)

On or Before March 30th, $40
After March 30th, $45

(+$2 for online registration fee for all online/credit card registrations)

Online Registration is CLOSED but you may still register 9 until 11:30 on Saturday morning.

All pre-registered entries include a T-shirt. Commemorative beverage glass to the first 150 who register. Sizes guaranteed in an event shirt if you register before April 6th. After April 6, sizes are first come-first served until we run out of event shirts. If a size is shown in the menu when you register, it is still available. Those who register late or once we are out of event shirts will still receive a shirt, however it will be a Mountain Goat logo tee. Please register early. Shirts run true to size.

A portion of the proceeds from this event will benefit SORBA Woodstock for the continued maintanence of the Blankets Creek and Rope Mill Park Trails. The race is a joint effort between Mountain Goat Adventures LLC and SORBA Woodstock.


2019 Blankets Creek Dirty 30 Accident Waiver (Bring to Race)

2019 Racer Update - READ THIS

Registered Competitor List

Cancellations and Transfers

We understand that injuries happen, you got sick or life was just too chaotic to train for one of our events. No refunds will be issued, however you may transfer your entry to another racer in the same event without penalty until April 15, 2019. You are responsible for finding a person interested in buying your entry, as well as working out payment with that person. Entries do not transfer to other events nor do they transfer year to year. If you would like to sell your entry to another racer, please contact with the name and email of the person you wish to transfer your entry to.

No refunds will be given in the event of an act of God that requires cancellation of the race for the saftey of participants. Once the race has started, no refunds will be given due to delayed start or early conclusion of the race.