The Mammoth Trail Run 2026 - 100K / 50K / 25K / 10K / 5K and Mighty Mammoth 1K Kids Dash
Glen Rose, TX
100K50K+3
Open until Oct 11from $35
100K Races Near Dallas, TX
As of October 6, 2026, Crewable lists 5 upcoming 100K races near Dallas, TX from October 2026 to February 2027. The next is The Mammoth Trail Run 2026 - 100K / 50K / 25K / 10K / 5K and Mighty Mammoth 1K Kids Dash on October 10 in Glen Rose, TX. Registration is open for 2.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
Race calendar
October 2026
2 racesNovember 2026
1 raceDecember 2026
1 raceFebruary 2027
1 raceQuick answers
What is the next 100K race near Dallas, TX?
The Mammoth Trail Run 2026 - 100K / 50K / 25K / 10K / 5K and Mighty Mammoth 1K Kids Dash, on Saturday, October 10, 2026, in Glen Rose, TX. Distances: 100K, 50K, 25K.
What is the closest 100K race to Dallas?
Camino De Los Muertos in Lewisville, TX, about 22 miles from Dallas, on October 31, 2026.
How many 100K races near Dallas, TX have open registration?
2 of the 5 list registration as open as of October 6, 2026, including The Mammoth Trail Run 2026 - 100K / 50K / 25K / 10K / 5K and Mighty Mammoth 1K Kids Dash and Camino De Los Muertos.
What is the busiest month for 100K races near Dallas, TX?
October 2026, with 2 of the 5. November 2026 follows with 1.
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