Ultramarathons Near Dallas, TX
As of October 6, 2026, Crewable lists 18 upcoming 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 6.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
Race calendar
October 2026
5 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
2 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 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 ultramarathon to Dallas?
Rockledge Rumble in Grapevine, TX, about 21 miles from Dallas, on November 14, 2026.
How many ultramarathons near Dallas, TX have open registration?
6 of the 18 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 Valley and Victory 14 Hour Ultra.
What is the busiest month for ultramarathons near Dallas, TX?
October 2026, with 5 of the 18. December 2026 follows with 4.
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