I run this race every year. It is on National Park service land so it is a lottery entry. They only let 400 people run it every year. It is an INSANE climb from the bottom of the Sandias to the Sandia Crest- about 6,000ft of gain! The first two miles are on the road up to the trailhead but the remainder is single-track trail climbing. It is so beautiful and SO well run. Run this race for sure if you're ever in Albuquerque but definitely do not skip elevation training.