Celebrating its 25th anniversary, this Anchorage event is shaking things up with a 500-yard lake swim, 9-mile mountain bike course, and 2.2-mile trail run—offering both a challenging 1-lap Sprint option and a tougher 2-lap Long course for solo competitors and teams. The hilly terrain features plenty of single track and technical sections that demand mountain bikes only (no hybrids, cyclo-cross, electric bikes, or drop bars), while the Duathlon alternative replaces the swim with a 1-mile run and is available as a solo 1-lap event. The 2-lap Long course is reserved for experienced dirt riders aged 18 and older unless you receive special approval from the race director.