An epic ride on a Friday w/ DP on the Rbx Pro. Left Coalville in the chilly early AM. Great roadway north towards Evanston. WARNING: Didn't take the correct (intended) turn for Evanston (in spite of the sign stating "Evanston"). We'll never know why. Was treated to over 22 miles of the most grinding rock filled roadway/trail/river crossings etc that no road bike should ever see (did see several moose on the way). The fact that not many road bikes have seen the stretch called "Chalk Creek to Mirror Lake Highway" is borne out by the fact there are only 3 athletes listed on that route (STRAVA) (and 2 of them were us on this day). While the scenery out there was truly EPIC the energy required to cross the expanse on a road bike was extraordinary (and unexpected). Add to this the stress/worry heaped on our SAG driver and it turned out to be ~5 hr "off the reservation" experience. I think a MTB would be a much more conducive choice for this section. Once back on the tarmac on the 150 (Mirror Lake Hwy) we adjourned to the Bear River Ranger Station (the best descent of the day IMO) and waited to rejoin with our SAG driver. After that wait (and a complete cool down which did neither of us any good) we completed the day heading to Kamas and electing to cut the intended completion in Coalville short in Oakley (at mile 100). Suffered with upper leg cramps on the ascent of Mt Baldy which was no fun Would I do it all again? Yeah. But think twice about getting the turns right (or in this case left) haha