The XTERRA World Championship
October 31
£560
The world’s premier off-road triathlon will celebrate its 25th year off-road in 2021. The event combines a 1.5-kilometer (1-mile) swim that starts at D.T. Fleming Beach in front of the Ritz-Carlton, Kapalua, a 31-kilometer (19.2-miles) mountain bike that climbs 3,500 feet up and down the lower slopes of the West Maui Mountains, and a 10.5-kilometer (6.5-miles) trail run that traverses forest trails, and beach sand.