So this is "The Catch"?

62 to -17  in 72 hours....

When you have a day in January like we had Saturday, where all is right in the running universe and warm rays of the blazing solar orb radiate across your running form as your well-oiled machine effortlessly glides across the trails, sauntering through a glorious mid-winter run - you take pause to stop and think, I live in the Rocky Mountains and this IS winter - there must be a catch...

And did you notice - close to a 100 degree temperature shift between a balmy 62 to -35 windchill???!!!
Welcome to the Rockies!