25 Hour Rules


The 25 Hours in Frog Hollow is a team relay and solo rider mountain bike event. The race will begin at 10:00AM on Saturday and ends 25 long, grueling hours later at 10:00 AM Sunday. This race is held each year over the “Standard time” time change (fall back) hence the extra hour of riding. Both team and solo riders will compete for prizes.

Because of the time change we roll back the clocks at 10 am sat and begin “frog time” . The race clock is then set back to 9 am and counts down to 10 am Sunday.


This race will include these categories:

  • § 6-10 Person Corporate co-ed – open ( may have any combination of racers)
  • § 5 person co-ed-open –must have at least 1 rider of the opposite sex ( 4 F & 1 M or 4 M & 1 F)
  • § 4 Person Male
  • § 4 Person Female
  • § 4 Person COED)
  • § Duo Male
  • § Duo Female
  • § Duo Co-ed
  • § Solo Men
  • § Solo Women
  • § Solo Single Speed Male
  • § Solo Single Speed Female

The course will consist of a 13-mile loop including 8 miles of single track. The trails for this course have been designed specifically for 24 hour desert racing.

The 25 Hours in Frog Hollow is a premier mountain biking event aimed at having a festival like atmosphere.  Our goal is to ensure that everyone will have a good time. So come and enjoy the friendship, team spirit, awesome trails and spectacular scenery that this event is sure to provide. Ride safe, ride fair and above all have fun.


  1. Complete Team 

Although team members are allowed to register individually a team is not considered complete until all racers have registered and signed a waiver. Only complete teams will be able to race in their category. (also see man-down below) 

a. Team Captains
Each team will designate a team captain. Team captains will represent the team in all official correspondence and communications before, during and after the event.

b. Alternative Configurations. 

Alternative configurations are not allowed. Single gender teams must not be co-ed, co-ed teams must not be single gender, and teams must be registered as complete to race. Racing with an alternative configuration is considered an unfair advantage and will result in a DNF.


  1. Substituting a Rider
    To substitute a rider, the new rider must fill out an Accident Waiver, complete with team name and original signature, and deliver it to Gro Promotions no later than the end of the last day of Registration. You may either mail the Accident Waiver to the address on the form, by the date specified or you may turn it in at Race Registration. Please write Rider substitute on the waiver and indicate who they are replacing. Changes made after the date specified on the Accident Waiver will incur a $10 late fee. Any changes or late waiver submissions received during the week prior to the race, regardless of postmark, will be $20 each. Substitutions may be accepted until Friday before the event. No changes or substitutions will be made after the close of Registration on Friday and there will be no Registration on race day.
  2. Permitted Course Riders
    Only officially registered racers, credentialed media and event staff may ride on the designated race course between noon on Thursday and 5 Pm Sunday of the event weekend.
  1. Minimum Age Requirement                                                                                  Gro Promotions will not allow any racer to enter the 25 hour race ( age limits are different for 6 hr event) that is younger than 14 years old. In addition racers between the ages of 14 and 17 must meet the minimum lap time  to qualify to race or demonstrate they have competed in similar events and provide official completion times at least 5 days before the event.  We do this to assure a safe environment on the course for all participants. If your child is able to ride the lap in one hour forty minutes or less they may ride in this event. If it’s an option we highly recommend heading out for a pre-ride on the course to get a feel for lap times. For exception appeal directly to the race director with a race resume of your child.
  2. Water and Food
    Water and food may be supplied to any racer, by anyone, anywhere on the course. However, racers must stay well clear of the course when taking food or water. Do not throw energy food wrappers on the ground. If you are caught intentionally littering it can be ground for disqualification.  Sometimes items are lost accidentally, so if you see a downed water bottle or food item on the course try to pick it up. Remember: Leave No Trace
  3. Support on the Course
    A rider on the course may be supported on the course only by other registered riders. Those riders may be from a different team and must enter the course under their own power, either on foot or on a bicycle. Accessing the course by traveling cross-country us not allowed. The use of non-course access roads is permitted, but the rider must check in both at the support tent and with any check point officers so they do no cause a team disqualification. Short-cutting the course is not allowed (see rule #6). Any rider who has entered the course in support of another may bring equipment and tools and may even swap bikes with the rider in need of support. Cannibalizing bike parts is permitted in this race. Supporting racers should stay clear of all competing racers. Supporting racers may take any equipment or tools with them; they may even swap bikes with their teammates. Cannibalizing bicycle parts is legal. Support can be provided by any registered racer on any team to any registered racer on any team.
  4. Short-cutting
    The desert environment is fragile. The official course was designed to reduce impact to the areas. Short-cutting or traveling cross-country off the course by any registered racer shall result in a disqualification of that racer’s team.
  5. Lights Burning
    Racers entering the course after 6:30 on Saturday and up to one-half hour before sunrise on Sunday (7:30) should have both primary and secondary light sources installed and in good working order. Racing without lights out to save batteries or racing with discharged batteries is dangerous and is done so at the riders own risk. It is also highly encourage that riders take a back up flashlight , pen light, or other safety light in case of total light failure. We also recommend a rear-blinking light for safety.
  6. Right of Way
    Please be nice on course! Announce when you are passing, always. When passing races less skilled then you, do not push or shove them to the side.

!We take it very seriously when a racer is being un-cool. Don’t be that guy.

  1. Penalties and Disqualifications                                                                            Rule Violations should be reported to the nearest race official. The race director will determine all penalties and disqualifications.
  2. Final Rulings
    The race director has the final say in any ruling, including rulings made by the co-director.


  1. Pre-race Meeting
    The pre-race meeting will be held at 9:30 am . The team captain and/or co-captain must attend the pre-race meeting; however, everyone is welcome.
  2. Start time and Bike Placement

The race will begin at 10:00 am on Saturday. The race will utilize a Lemans style starting procedure.  Riders will leave their bikes at the Stage tent and line up at the starting line.  The racers will then run a designated course to pick-up their bikes.

If you miss the line-up and run, you must wait until all racers have past the timing tent, before you can join the race.



  1. Exchange Tent                                                                                                                 Only team members and event workers are allowed in the rider transition area while the ride is being conducted. Please keep all dogs and children from entering the tent.
  2. Logging Out / IN                                                                                                        -Upon completing a lap each race must go through the gate by dismounting. You should know your number and category and say it to the officials. Your number will be recorded on a computer and hand system.

-If the rider is to continue on for another lap he or she must check out on their way in the tent and check in as they leave the tent again. If a rider fails to do this only one lap will be recorded.

-If a team cancels a riders lap and is starting the lap over with a new rider, the log-in time recorded for the rider failing to complete the lap is the eliminated.

  1. Transition

There is no baton, when a team mate makes contact with the incoming rider they may head out on their lap. The incoming rider must proceed to the check in table and announce their name and the next rider out. Teammates may take sequential laps but need to tell the timer they are going out for another lap.

  1. Verifying Times  
    It is the team’s responsibility to verify their lap times.  Teams should discuss any discrepancies as soon as they are discovered with the race director. Teams are encouraged to keep their own team log to support and questions or protests.


1. Teams may finish the race at any time before 10 am without penalty. 

2. Duo and 4 person Teams. All team members must complete 1 night lap between 6 pm and 6 am to qualify for the podium.

3.Five person teams are automatically coed and must include at least one rider from the opposite gender. Each person on the team is required to complete a minimum of one night lap in order to be considered in place ranking. A night lap must be started between 6 PM and 6 AM ( frog time)

4.The corporate team category will consist of six to ten riders with no male/female restrictions. Corporate teams need not necessarily have sponsorship. There are no completion rules for a corporate team. They are just having fun.

5. Man Down/Riding Short

We realize that sometimes a team is forced to ride with a man-down due to injury, bike malfunction or other scenarios. We realize this can happen anytime within a race. If your team experiences a man-down, notify the timer and you may continue racing as a handi-caped team.


The ending time for the race is 10:00 AM on Sunday. No racer may enter the course after 10:00 AM.  Any racer still on the course after 10:00 AM will log off after completing the lap. The final finishing places are to be determined by the total number of laps completed and the order in which each team completed the final lap. For example, a team that has completed 22 laps with a finish time of 10:31 p.m. would beat a team that completed 22 laps, with a finish time of 10:47 p.m. And, of course, a team that completed 23 laps, with a finish time of 11 a.m., would beat them both. If a racer logs- out before 10 and no other team member logs-in before 10:00 a.m., the last completed lap time will be the finish time. 


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