Arguably the most popular group ride in Boulder — and maybe one of the toughest in the country! — the Gateway Ride is a beloved route that has been enjoyed by locals for years. Expect 70-100 cyclists and some furious attacking off the front. Starting at the Gateway Fun Park Center, the ride takes cyclists along a mostly flat circuit all the way out to Carter Lake and back. Join the peloton for a good speed workout Saturday mornings at 10am, but watch out for wind, especially in the spring!