Just keep moving, never give up, don't sit on the rocks above tree line, you'll be just fine....HOOAH In response to: I am signed up for the marathon, but have not run in months. I have been cycling at high altitudes (Mt Evans 4x), and many other mountain passes each weekend for 6-8 hours each day during the weekend.. I have all but confirmed to myself that I won't run the PPM because of my lack of running, however, I wanted to see if anyone here is an avid cyclist and has done the PPM on only cycling training- I am very fit and have run on trails this year, but nothing since the start of summer. Thanks guys!!