Stage 4 departs Aspen Aspen Public Radio Published August 20, 2015 at 1:45 PM MDT 1 of 8 2 of 8 The 2 man break away begins the switchback up Independence Pass Alycin Bektesh / Aspen Public Radio 3 of 8 Riders during the 20 mile Independence Pass Climb Alycin Bektesh / Aspen Public Radio 4 of 8 Rider Kyle Muphy is the first to summit Independence Pass at 12,095ft Alycin Bektesh / Aspen Public Radio 5 of 8 Fans cheer on riders on the ascent of Independence Pass 6 of 8 Many fans rode their own bikes up Independence Pass ahead of the riders Alycin Bektesh / Aspen Public Radio 7 of 8 Fans from Aspen and Carbondale in bear outfits on the top of Independence Pass Alycin Bektesh / Aspen Public Radio 8 of 8 A chalk drawing on Highway 82 asks riders 'Got O2?" Alycin Bektesh / Aspen Public Radio Follow us on twitter, Instagram and Facebook for pictures and updates for Stage 3 & 4 of the USA Pro Challenge