Experience the grandeur of Harriman State Park as MammothMarch returns for its Hudson Valley edition on September 26. Spanning over 31 lakes and miles of scenic trails, this park offers an unparalleled setting for your trekking adventure. The day's highlight is a 20-mile single-circuit route that begins and ends at Lake Welch. As you traverse Long Path, Beech Trail, Arden Surebridge Trail, and more, immerse yourself in the natural beauty and diverse wildlife of Harriman State Park. This challenging yet rewarding journey will test your endurance while offering breathtaking views. The Hudson Valley is a treasure trove of history, culture, and scenic landscapes that draw visitors from around the globe. Its rich heritage and vibrant farmer’s market scene have earned it recognition as one of National Geographic Traveler's "Top 20 Best of the World Destinations." As you complete this mammoth challenge, you will feel both exhausted yet exhilarated. You'll join a community of nature enthusiasts, hikers, and MammothMarch devotees who share your passion for adventure. First-time participants are encouraged to explore past events and read what others have shared about their experiences at https://www.mammothmarch.com/reviews. Secure your spot now by signing up online. The price includes all mandatory charges, ensuring a seamless registration process. Join us for an unforgettable journey through the heart of Harriman State Park!
Races Offered
MammothMarch Hudson Valley
Opening soon
Sep 26, 2026
straighten
Distance —
MammothMarch Hudson Valley
Opening soon
terrain
Type —
Running
timer
06:45
sell
$73.44
Weather History
These values represent the 3-year monthly averages for September in Southfields.
thermostatTemperature
13.9° / 22.7°
wb_sunnyFeels like
12.6° / 21.9°
light_mode
Avg sunshine hours
8h 48m
water_drop
Avg rainfall
3.8 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
9.5 km/h (Light breeze)
opacity
Sweat loss rate
Moderate
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (5.0)
humidity_mid
Humidity
76.5%
wb_twilight
Sunrise
06:37
nightlight
Sunset
19:04
About Southfields
Learn more about the host city, Southfields.
Tuxedo is a town and village in Orange County, New York, United States, along the Ramapo River. As of the 2020 census, the town had a total population of 3,811. The village was incorporated in 2021 and comprises all of the town that is not part of the village of Tuxedo Park. As of the 2020 Census, the village has a population of 3,169. The town is in the southeastern part of the county in the Ramapo Mountains. New York State Route 17 and the New York State Thruway pass through the town. The name is derived from a Lenape word tucseto, which has several known meanings.
