SIX03 Endurance

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 beer? 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!

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

Live Stream for the Sunapee Scramble starts at 8am EST

Registration for the Sunapee Scramble closes at Midnight on Thursday June 4th. There is no day of registration. https:/...
06/03/2026

Registration for the Sunapee Scramble closes at Midnight on Thursday June 4th. There is no day of registration.
https://ultrasignup.com/register.aspx?did=133545

USATF-New England Mountain/Ultra/Trail
Northeast Delta Dental
Brooks Running
Maurten
Marathon Sports NH

Register Now!

The Sunapee Scramble is next weekend!
05/29/2026

The Sunapee Scramble is next weekend!

Email from SIX03 Endurance The Sunapee Scramble is a week away!   The Sunapee Scramble is a week away! REGISTER FOR SUNAPEE SCRAMBLE Mountain Racing comes back to Sunapee! June 7th 2026 $30,000 Prize

Trail Race szn has started!!!!DIXON'S REVENGE TRAIL RACE: May 9thhttps://ultrasignup.com/register.aspx?did=135178Sunapee...
05/04/2026

Trail Race szn has started!!!!
DIXON'S REVENGE TRAIL RACE: May 9th
https://ultrasignup.com/register.aspx?did=135178

Sunapee Scramble : June 7th
https://ultrasignup.com/register.aspx?did=133545

Cirque Series Cannon: June 13th
https://www.cirqueseries.com/cannon-mountain

Cirque Series Killington June 27th
https://www.cirqueseries.com/killington

Loon Mountain Race: July 12th
https://ultrasignup.com/register.aspx?did=130991

Ragged 75 Stage Race and 50k July31st, Aug 1st, Aug 2nd
https://ultrasignup.com/register.aspx?did=130238

Kismet Cliff Run Sept 13th
https://ultrasignup.com/register.aspx?did=134149

Cirque Series Jay Peak: Sept 26th
https://www.cirqueseries.com/jay-peak

Vulcan's Fury Trail Race: Oct 11th
https://ultrasignup.com/register.aspx?did=134151

Cranmore Mountain Race: Oct 17th
https://ultrasignup.com/register.aspx?did=134916

Register Now!

Didn't get into the Mount Washington Race because they cut the Participants to 500?Didn't want to spend over $175 to run...
02/26/2026

Didn't get into the Mount Washington Race because they cut the Participants to 500?
Didn't want to spend over $175 to run the Mount Washington Race?
Same day, just a different mountain.

Cirque Series has you covered

The 8.2-mile course kicks off at the base of the K-1 Gondola. With 3,010’ ft of elevation gain, you’ll end up summiting three of Killington Resort’s six peaks. Counter Clockwise course direction, running up from K1 Base Area immediately ascending the service road until you hit Buster Bunny. Yo...

Pretty big announcement for the Kismet Cliff Run!
02/07/2026

Pretty big announcement for the Kismet Cliff Run!

Announcing the welcome return of skyrunning in the USA with a four-race Merrell Skyrunner® USA Series alongside a US stage on the Merrell Skyrunner® World Series – already announced in December. The four races stretch right across America, from the South East to the North West – from New York ...

Almost a heat wave!The Pub Runs start at 6pm!. There is a 3 and 5 mile option. Its free and its fun! Dover: The Brick...
02/03/2026

Almost a heat wave!
The Pub Runs start at 6pm!. There is a 3 and 5 mile option.
Its free and its fun!
Dover: The Brick
https://www.facebook.com/groups/1459029770986221/
Portsmouth: Loaded Question Brewing Co.
https://www.facebook.com/groups/1463015297279761

2026 SIX03 Endurance Membership is OPEN
https://myemail.constantcontact.com/SIX03-Endurance-in-2026.html?soid=1135178060655&aid=a6tuq63IsAE

Email from SIX03 Endurance 2026 Membership now open The 2026 SIX03 Endurance Membership is now open! 2026 is the year of the Fire Horse: The Horse embodies enthusiasm, speed and fieriness, bringing a

Registration is open for the 2026 Trail Races!!!
01/26/2026

Registration is open for the 2026 Trail Races!!!

Email from SIX03 Endurance Huge Prize Money in 2026!   Marathon Sports goes to the Trails in 2026 !!! Shop Marathon Sports Trail Register For Dixon's Revenge Presented by Altra Running and Darn Tough

The 2026 SIX03 Endurance Membership is now open!
01/23/2026

The 2026 SIX03 Endurance Membership is now open!

Email from SIX03 Endurance 2026 Membership now open The 2026 SIX03 Endurance Membership is now open! 2026 is the year of the Fire Horse: The Horse embodies enthusiasm, speed and fieriness, bringing a

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

Alerts

Be the first to know and let us send you an email when SIX03 Endurance posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The Business

Send a message to SIX03 Endurance:

Shortcuts

Share

Category