5 days are left for the end of electronical registrations for races of the 16th OM organisation (Olympus Marathon, Olympus Ultra and Olympus Vertical). From May 15th, starts the countdown for the biggest and most popular mountain races..
Don't lose the chance..
claim your registration now :
Olympus Marathon : http://www.olympus-marathon.com/en/race-registration/registration
Olympus Ultra : https://www.olympus-marathon.com/en/olympus-ultra-rules-conditions-registering
Olympus Vertical : https://www.olympus-marathon.com/en/register-form/olympus-vertical