XTERRA Arizona Trail Run Series kicks off at Estrella Mountain Park. Consisting almost entirely of single track, the 8k and 20k courses will challenge beginner and experienced trail runners alike. The courses begin at the park’s competitive loops. Both courses are based at the competitive loops off of Avenida Estrella behind PIR. There are two (or three) major hills and a quite a few twists and turns as the course winds through the valley desert. You finish the last half mile with a wide descent to help propel you across the finish line. The event also includes a huge post-race breakfast spread and post-race festivities complete with awards and raffles.