Arizona Endurance Series Posted on October 20, 2007 | 4 comments The Arizona Endurance Series (AES) consists of a number or grassroots, endurance races and rides. At the beginning of the year, the Antelope Peak Challenge will open the series with some little known singletrack near the town of Oracle. We have another Tucson ride, the Tortilita 50,  at the beginning of February. Next up is a ride that includes the famed Ripsey ridgeline. This is a great chance to check out a remote and rarely ridden section … Continue reading Tortolita 50 Arizona Endurance Series →