On July 15, Grinduro is taking over the Isle of Arran in Scotland, and we hope you’ll be there! Grinduro combines the best elements of gravel grinding with a mountain bike enduro-style format. It’s a 60-mile loop of pavement and dirt where finishing times aren’t based on overall loop time, but four timed segments. With live music, great food and a handmade bike/art show, Grinduro Scotland is a party you won’t want to miss. Register now!.