So you like Strava Challenges? We have something for you! Strava Challenges are the latest addition to Sir Walter Running's Pop Up Running series. Before you do anything else, join our Strava club here: https://www.strava.com/clubs/SirWalterRunning (and click join). Sir Walter Running will host monthly Strava Challenges, with winnings being free race entries, free swag, and VIP seating at