Trail Races & Ultramarathons Near Dallas, TX
As of October 6, 2026, Crewable lists 22 upcoming trail races and ultramarathons near Dallas, TX from October 2026 to July 2027. The next is Caveman Challenge at Waterloo Lake on October 10 in Denison, TX. Registration is open for 10.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
Race calendar
October 2026
8 racesThe Mammoth Trail Run 2026 - 100K / 50K / 25K / 10K / 5K and Mighty Mammoth 1K Kids Dash
Glen Rose, TX100K50K+3Open until Oct 11from $35
November 2026
3 racesDecember 2026
4 racesFebruary 2027
1 raceMarch 2027
2 racesApril 2027
1 raceMay 2027
1 raceJune 2027
1 raceJuly 2027
1 raceQuick answers
What is the next trail race or ultramarathon near Dallas, TX?
Caveman Challenge at Waterloo Lake, on Saturday, October 10, 2026, in Denison, TX. Distances: 50K, Marathon, Half Marathon.
What is the closest trail race or ultramarathon to Dallas?
Run/Walk for a Hunger Free World in Plano, TX, about 17 miles from Dallas, on October 17, 2026.
How many trail races and ultramarathons near Dallas, TX have open registration?
10 of the 22 list registration as open as of October 6, 2026, including Caveman Challenge at Waterloo Lake, The Mammoth Trail Run 2026 - 100K / 50K / 25K / 10K / 5K and Mighty Mammoth 1K Kids Dash and Run/Walk for a Hunger Free World.
How many of the trail races near Dallas, TX are ultramarathons?
18 of the 22 are ultramarathons (longer than a marathon, or a backyard, timed or 200+ mile format). The other 4 are shorter races.
What is the busiest month for trail races and ultramarathons near Dallas, TX?
October 2026, with 8 of the 22. December 2026 follows with 4.
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