There are three types of Challenge:

• 3-Hour Challenge: 3 laps, 1 per hour
• 6-Hour Challenge: 6 laps, 1 per hour
• 10-Hour Challenge: 10 laps, 1 per hour

Each lap starts at the top of the hour. If you finish a lap in under an hour, you may rest until the next lap starts.

To successfully complete a lap, the entire course must be covered in less than 1 hour.

No competitor may begin a lap earlier than the top of the hour, regardless of when the previous lap was finished, so choose your strategy wisely.  For example, if it takes 50 minutes to complete a lap, you must wait 10 minutes until the top of the hour to start the next lap.

Only competitors completing their lap in under an hour are eligible to begin the next lap as official participants in the “Challenge.”  Those failing to run a sub-hour loop may continue to run and have their mileage officially recorded but are out of the Challenge.

The official race finish order will be based on the order in which the final lap is completed. Those completing more than six laps will have those distances recorded, up to 10 hours when the park tells us we have to go home.

The 10-Hour Challenge is a serious effort and has been accomplished by just less than two dozen people in 10 years.