The Wasatch 100...

is a challenging high altitude endurance run along the rocky spine of the Wasatch Range between Kaysville and Midway, Utah. Here's a shot of the terrain where the cumulative elevation gain over the entire course is about 27,000 ft:

Rachel and I supported one of her friends in the event the past two days, providing water, food, etc. at several aid stations along the course, with Rachel running the last 25 miles as a pacer.

RELATED: Here's Rachel's latest column in the October 2010 issue of Runner's World on the joys of trail running: Ode to Dirt. And a previous article about running the Grand Canyon rim-to-rim-to-rim in the June 2010 issue of Running Times: The Colossal Crack.