The Spirit of Syllamo returns to Norfork, Arkansas on December 12th, challenging runners with a brutal yet rewarding experience through the rugged Ozark Mountains. This ultra event offers two distance options: a grueling 100-mile course and an equally demanding but slightly shorter 38-mile route. Both distances traverse highly maintained singletrack trails that are steep, rocky, densely forested, and will push even seasoned ultramarathoners to their limits.
100M Start: 06:00:00 • Fee: $250.00
38M Start: 06:00:00 • Fee: $90.00
On race morning, runners can expect clear skies with firm trail conditions underfoot. The temperature is expected to range from a chilly start in the mid-30s Fahrenheit to mild afternoon temperatures reaching into the low 50s, with UV index at Low (2.0). Runners should be prepared for variable weather and potential precipitation risks as they navigate through dense forests along the White River. Since its inception, the Spirit of Syllamo has become a cornerstone event in Norfork’s ultrarunning calendar, drawing participants from across the United States who seek to challenge themselves against nature's toughest terrain. The race is known not just for its physical demands but also for fostering a community spirit among runners and volunteers alike. The course winds through rugged trails that are steep and rocky with sections crossing paved roads only as necessary. Aid stations will be well-stocked, offering substantial supplies and support from experienced volunteer teams dedicated to ensuring the safety of every runner. Detailed maps and route descriptions can be found on the race website for those looking to prepare in advance. In December at Norfork, trail conditions are firm with slightly soft spots underfoot due to recent weather patterns. UV index is expected to remain low (2.0) throughout the day, reducing exposure risks but still requiring proper sun protection measures by runners. The Spirit of Syllamo offers a 100-mile ultra distance and a shorter yet equally challenging 38-mile option for those looking to dip their toes into longer-distance trail running. Runners can register via the official website at https://ultrasignup.com/register.aspx?did=135331, with fees set at $250.00 for the full distance and $90.00 for the 38-mile course. Bib pickup will take place on race morning from 6:00 am to 7:45 am at Riverview Trailhead (309 Riverview Trail, Norfork, AR). Participants are advised to bring their registration confirmation email and a valid photo ID. The start location for the race is also located here. The Spirit of Syllamo starts at 8:00 am on December 12th from 309 Riverview Trail in Norfork, Arkansas. All runners must be prepared with appropriate gear given the challenging course terrain and weather conditions common to this time of year. Spirit of Syllamo offers a unique blend of natural beauty and physical challenge that draws participants back year after year for its rigorous test of endurance within one of America's most scenic landscapes.
Races Offered
100M
Dec 12, 2026
straighten
Distance —
160.9K
terrain
Type —
Running
timer
06:00
sell
$250.00
38M
Dec 12, 2026
straighten
Distance —
61.2K
terrain
Type —
Running
timer
06:00
sell
$90.00
Weather History
These values represent the 3-year monthly averages for December in Norfork.
thermostatTemperature
2.2° / 12.3°
wb_sunnyFeels like
-1.6° / 8.7°
light_mode
Avg sunshine hours
7h 6m
water_drop
Avg rainfall
1.4 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
10.8 km/h (Light breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Low (2.0)
humidity_mid
Humidity
69.3%
wb_twilight
Sunrise
08:12
nightlight
Sunset
17:56
About Norfork
Learn more about the host city, Norfork.
Norfork is a city in Baxter County, Arkansas, United States. As of the 2020 census, Norfork had a population of 465.