You can find everything from 5k walks to multi-day endurance gravel races on athleteReg's event calendars. Pick your discipline below to find events!
Charity Rides, Gravel, Criteriums, Cyclocross, Enduro: it's all here
5ks, Marathons, trail races, stair climbs: it's all here
Triathlons, duathlons, aquabike. All -athlons that aren't biathlons.
Alpine skiing, nordic skiing, snowboarding. Someone should have bought the snowboardreg.com domain!