SIX03 Endurance

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SIX03 Endurance SIX03 is a club of fun, healthy, and athletic people that share a passion for the outdoors and the social community. Just getting into cyclocross? Come meet us!

We are runners, cyclists, swimmers, skiers, snowboarders, cross-fitters, 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. 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 b**r? We are the newest and most outgoing Endurance club in the Seacoast! That’s right, in case you didn’t get it... SIX03 is here to represent New Hampshire’s Endurance community. Not One Sport, Every Sport!

Registration closes at midnight for the Cranmore Mountain Race!See everyone this weekendhttps://ultrasignup.com/register...
10/15/2026

Registration closes at midnight for the Cranmore Mountain Race!
See everyone this weekend
https://ultrasignup.com/register.aspx?did=134916

( There is no day of registration)

October 17, 2026: 5k- 1 Loop race in North Conway, NH. Organized by Marathon Sports. Register now on UltraSignup.

Kismet Cliff Run is 1 week away!!!Half Marathon & 5 Mile option
09/06/2026

Kismet Cliff Run is 1 week away!!!
Half Marathon & 5 Mile option

September 13, 2026: 1/2 Marathon race in North Conway, NH. Organized by Marathon Sports. Register now on UltraSignup.

Last reminder to sign up for the Ragged 50k!!!! Registration closes on Weds 7/29/26 at Midnight. There is no day of reg...
07/27/2026

Last reminder to sign up for the Ragged 50k!!!!
Registration closes on Weds 7/29/26 at Midnight.
There is no day of registration.
This race is part of a 3 day stage race. We will not be answering your emails when you say you missed the registration cut off because we are on trail. So just signup now, you know you want to.
$30,000 prize purse is on the line, thanks to Altra Running

July 31, 2026: Stage Race race in Danbury, NH. Organized by Marathon Sports. Register now on UltraSignup.

The Loon Mountain Race is 4 days away but Registration closes tomorrow (Thursday ) at Midnight. There is no day of Regi...
07/08/2026

The Loon Mountain Race is 4 days away but Registration closes tomorrow (Thursday ) at Midnight. There is no day of Registration.

July 12, 2026: Loon Mountain Women race in Lincoln, NH. Organized by Marathon Sports. Register now on UltraSignup.

Live Stream for the Sunapee Scramble starts at 8am EST
06/07/2026

Live Stream for the Sunapee Scramble starts at 8am EST

Address

Washington Street
Dover, NH
03820

Opening Hours

Monday 5am - 8pm
Tuesday 5am - 8pm
Wednesday 5am - 8pm
Thursday 5am - 8pm
Friday 5am - 8pm
Saturday 8am - 12pm
Sunday 8am - 1pm

Telephone

+16038173672

Website

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