Strava is challenging you to run 10k as fast as you can between January 1st and January 31st. #stravaraces
Gran Fondo 1: Go on a 130km cycling adventure. In the first Challenge of the Gran Fondo series, Strava is challenging you to ride 130 kilometers in one ride between January 1st and January 31st. #StravaGranFondo
Strava is challenging you to run 10k as fast as you can between February 1st and February 28th.
To celebrate its recent victories in the Tour and Giro, Campagnolo is challenging cyclists to attempt their own version of a Grand Tour by riding 1,000km in 30 days. http://www.strava.com/challenges/campagnolo-grande-giro