The Shocking Announcement Just two weeks after the prestigious trail running event in Chamonix, the announcement of a positive doping control for Kenyan athlete Joyline Chepngeno has sent shockwaves through the ultra trail community. Chepngeno, who recently claimed victory at Sierre-Zinal, a key race within the Ultra-Trail du Mont-Blanc (UTMB) circuit, now finds herself at…