Source Endurance Training Center of the Rockies is hosting a 6 race time trial omnium this winter. You can sign up to race the 530pm or 730pm time slots on 10/05, 11/02, 12/7, 1/11, 02/01/ and 03/08. Each course will be different. Participation in each race isn't required to compete for the overall.
Shwag bags and prizes for both women and men.
Cost is $20, one punch from your card or free for monthly members.
Sign up here: https://goo.gl/nsLFg2
Source map (it's a little tricky to find so be sure to check out the Google map): https://goo.gl/maps/H84K7MpBwxT2
Be sure to like their Facebook page for updates: https://goo.gl/LD631U