MammothMarch returns to Bear Brook State Park on August 28, 2027, promising an unforgettable adventure for nature enthusiasts. This scenic 20-mile course winds through the extensive forests of New Hampshire's largest developed state park, revealing hidden marshes, bogs, summits, and serene ponds along the way. Participants will have the opportunity to explore some of Bear Brook’s lesser-known trails while enjoying its stunning natural beauty. The challenging yet rewarding terrain offers a perfect blend of physical exertion and breathtaking scenery, making it an ideal destination for those seeking both adventure and relaxation. Upon completing this epic journey through one of New Hampshire's most scenic hidden gems, runners will be rewarded with a finisher medal that symbolizes their achievement and camaraderie. The event fosters a strong community among nature lovers, hikers, and avid MammothMarch participants who return year after year to experience the unique blend of challenge and beauty. First-time attendees can gain insight into previous events by checking out reviews from past participants on our website at https://www.mammothmarch.com/reviews. Secure your spot for this memorable event now, knowing that all fees are included in the registration price. Join us as we celebrate nature's splendor through a day filled with adventure and camaraderie. Experience Bear Brook State Park like never before on August 28, 2027.
Races Offered
MammothMarch New Hampshire
Opening soon
Aug 28, 2027
straighten
Distance —
MammothMarch New Hampshire
Opening soon
terrain
Type —
Running
timer
00:00
sell
$73.44
Weather History
These values represent the 3-year monthly averages for August in Allenstown.
thermostatTemperature
15.2° / 25.5°
wb_sunnyFeels like
14.8° / 25.4°
light_mode
Avg sunshine hours
10h 51m
water_drop
Avg rainfall
3.6 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
8.4 km/h (Light breeze)
opacity
Sweat loss rate
High
terrain
Course conditions
Hard and dry surface
sunny
Max UV Index
High (7.0)
humidity_mid
Humidity
74.9%
wb_twilight
Sunrise
05:52
nightlight
Sunset
19:45
About Allenstown
Learn more about the host city, Allenstown.
Allenstown is a town in Merrimack County, New Hampshire, United States. The population was 4,707 at the 2020 census, up from 4,322 at the 2010 census. Allenstown includes a portion of the village of Suncook. Just over one-half of the town's area is covered by Bear Brook State Park.