April

  • April 21st: 24 Hours of Palmer Lake Death Race - Palmer Lake, CO

http://ultrasignup.com/register.aspx?did=55057

  • April 14th: Rattler Trail Run - Colorado Springs, CO

https://www.madmooseevents.com/rattler-trail-race

May

  • May 19-20th: Colfax Marathon - Denver, CO

 http://www.runcolfax.org/races/marathon/

  • May 20th: NORAD Trail Race - Cheyenne Mountain State Park, CO

https://www.madmooseevents.com/norad-trail-race

  • May 28th: Bolder Boulder - Boulder, CO

http://bb10k.bolderboulder.com/register/register-online/

August

  • Aug. 11-12th: Steamboat Stinger Running Races - Steamboat Springs, CO

 https://www.bikereg.com/36663