October 19-20, 2019

Rocky Hill Ranch, Smithville, Texas
9:00 a.m. (all races!)

A 24-hour mountain bike race that can be done solo or on a team of up to 10 people. This is a 10(+-) mile course. Teams try to log as many laps as possible, with only 1 member riding at a time. The team or solo rider with the most laps in the 24 hour time period wins. The single track winds through oak and pine groves combining quick up & down hills, short technical sections, and fast flowing trail. The course is marked with arrows for day riding, reflective tape for night riding.

You can find all the rules on our FAQs page

Register for the 24hrs of Rocky Hill


Rocky Hill Ranch

Contact Pam Hill at the ranch for reservations for RV sites or general camping questions.
Pam: greylhill@aol.com (all reservations must be made by email. No phone reservations please)
Camping at Rocky Hill Ranch: Ranch info
Hotels can be found in Smithville and Bastrop. There are also area Bed & Breakfasts.

Extra Bits

Right to Cancel or Reschedule – Terra Firma Racing LLC reserves the right in the event of inclement weather, emergency, or natural disaster to cancel the race or move to a later time that day or alternate date within the year (if available). In the event of a CANCELLATION with no ability to reschedule, there will be NO REFUND OF ENTRY FEES.  Each athlete must accept any such risk for their entry paid. That said, we have never had to cancel the DIRTY DOZEN MOUNTAIN BIKE RACE yet. We even had snow one year. We did have to shorten the course to 8 hours instead of 12 though.