SIX03 Endurance is a 600 Member Multi Sport Team comprised of fun, healthy, and athletic people that share a passion for the outdoors and the social community. We are runners, cyclists, swimmers, skiers, snowboarders, cross-fitters, Ultra Marathoners, adventure athletes, tri-athletes, social butterflies, and much, much more! Our members range from people looking to run their first 5K, to multi-Ironman finishers. We are recreational runners and we are tri-athletes. We are skiers, riders, and ski lodge drinkers. We are cross-fit curious and World’s Toughest Mudder Finishers. We are always looking for new members and new activities. Just getting into cyclocross? Training for your first marathon? Deciding what bike to buy for your next tri? Want to know the cheapest place to buy GU? Want to run a 5K? Just want to grab a beer? Come meet us! We are the newest and most outgoing Endurance club in the Seacoast! SIX03 represents New Hampshire’s Endurance community. Not One Sport, Every Sport!