The Longest Endurance Race in the Country.
Formerly the Iconic 25 Hours of Thunderhill
Welcome to History in the Making
The legendary 25-hour endurance race that captured the spirit of racers for decades at Thunderhill is reborn at
Ozarks International Raceway. This is where long run endurance meets the most advanced tech in racing.
This is your chance to be part of the longest, most grueling, most iconic endurance race in North America.
Challenge your team. Test your machine. Push yourself beyond the limits. Build better drivers. Become a better team.
Event Details
- Event: NASA 25 Hours of Ozarks
- Date: November 13-16
- Pro Pass Holders Early Entry 2pm, Nov 12
- Load in 5pm, Nov 12
- Location: Ozarks International Raceway, Gravois Mills, MO
- Classes: Multi-Class. 5 classes
- HYC (Hypercar)
- PLE (Prototype Lite Endurance)
- GTE (Grand Touring Endurance)
- STE (Super Touring Endurance)
- TCE (Touring Car Endurance)
- Single Class Qualifying
- Entry Cap: 62 Teams

Whatβs New?
- New venue with dynamic natural terrain.
- Fresh challenges and strategy with the unique Ozarks circuit.
- Sector Timing. You’ll know where your team is fastest and slowest. Compared with all other teams.
- Day and Night Practice – Thursday, Nov. 13.
- Test and Tune – Friday, AM Nov 14.
- Speed Delta’s set and managed. Overall lap times 2:45 or better.
- Single Class Qualifying, Best Time
- My Laps in car virtual flags join the best corner flaggers in racing. GPS satellite location monitoring shows exactly where you are every second.
- Livestream for the full 25 Hour, roving announcers, guest speakers. Your team and Sponsors highlighted.
- WhatsApp team communication from tower to team.
- Yellow Flag Pit Stops
- Team/Sponsor Suites Available

- Choose our Premium Pro Pass Package. 1 stop registration. Purchase your Pro Pass and set up your vehicle registration.
- Includes:
- Team Vehicle Entry for Thurs. and Fri. Test Days
- Garage rental
- Early Grid Selection,
- RV Parking Space
- Golf Cart rental for duration of event
- Early access to parking selection system to select garage and pit space locations before general registration opens
- Transponder rental for MyLaps virtual flagging with nonstop GPS Satellite location monitoring.
- Access to Driver/Team/Crew Lounge
- Unlimited Crew Members
- Pro Tour and paced track laps from track owner Jr Pesek and/or Pro IMSA/SRO Driver James Pesek.
- Priority entry to facility
- (Premium Pro Pass is applicable to an individual team vehicle. Any team competing multiple vehicles that wishes to apply Premium Pro Pass benefits to multiple team vehicles must purchase the option for each team vehicle.)
- Build your own NASA 25 Hour Race Package.
- Select each line item to build your 25 hour race.
**Teams that take advantage of our PRO PASS registration will participate in the preregistration parking option when that process opens August 4. Preregistration parking gives teams early access to secure their grid spot, garage space, RV spot and paddock assignment.
Questions?
We’d like to hear from you.
Donna or Randy Lane
25hr@drivenasa.com

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Team NASA MidAmerica, alongside Randy and Donna Lane, would like to extend our sincere gratitude to the entire NASA Leadership and Thunderhill Raceway for your support and belief in this monumental transition of the beloved 25-hour race. Your faith in this move means the world to us, and we are honored to carry this legacy forward.