Prerequisite (for the 50 miler):
  • The Lost Boys Ultra 50 Miler is a tough ultramarathon that is run through harsh desert trails and over mountainous terrain. In order to be prepared and safe entrants must do adequate preparation and training; including studying the maps and directions, and long training runs in the mountains (20-30 miles). 
  • Potential 50 mile entrants must have completed at a MINIMUM an official trail 50k race (within the race's qualifying time) between April 1, 2016 and the day they register for Lost Boys 50 Mile. 
  • No prerequisite is required for the 55k race.
  • Registration is now closed! To check out the entrants list CLICK HERE.
  •  Registration fees will be as follows:
  • Shuttle service is highly recommended since parking is very tight at both start line areas. The shuttle fee is $25 and must be received by April 17, 2018. You can register for the shuttle in one of two ways:
Option 1.) Select the service at time of registration on
Option 2.) Mail in the $25 check payable to Cliffs And Meadows to the following address:
Cliffs and Meadows
PO Box 461107
Escondido, CA 92046

  • The 50 mile race is limited to 120 runners and the 55 kilometer race is limited to 80 runners after which we will maintain a wait list.
  • Bibs are non-transferable and cannot be rolled over to later years or to other races.
  • Partial Refunds will be given as follows:
    90% of registration plus shuttle fees, plus CA fee (through December 31, 2017)
    of registration plus shuttle fees, plus CA fee (through January 31, 2018)
    70% of registration plus shuttle fees, plus CA fee (through February 28, 2018)
    50% of registration plus CA fee (through March 15, 2018)
    40% of registration plus CA fee (through April 1, 2018)
    No refunds after April 1, 2018