FOURmidable

The FOURmidable takes place in Auburn, California, on terrain that gives no quarter: wild trails, marshy sections, and forest crossings punctuated by numerous waterfalls make up most of the course. Four distances are on the program to suit every level: 8.1 miles, a half marathon (13.1 miles), 21.7 miles, and a 50K (31 miles). Runners can choose a quick tour of the terrain or commit to a genuine endurance test out in nature, with the waterfalls and varied ground giving even the shorter distance a demanding, scenic character.