Enduro is a form of Mountain bike racing in which there is a greater proportion of downhill sections, which are timed, to uphill and cross country sections. This aims to test rider's technical bike handling skills as well as providing endurance and climbing.nduro differs from XC cross-country cycling racing (which historically has more emphasis on cardiovascular fitness and less emphasis on technical ability) and pure downhill cycling racing formats, which may contain little to no climbing or cross country skills.