DateExpected
Early October 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
High Hope Ranch, Glen Rose, Texas
Glen Rose, Somervell County
Countdown
October
Half the ultra, same trails. Three laps make this a friendly way into 50 km, with no cut-off stated in the participant guide.
Key facts
01No cut-off stated in the 2026 participant guide
02Three laps of the Silver loop plus the Spur loop
Create a free training plan for the The Mammoth Trail Run 50 km
7-day free trial, no card required
The course
One lap, on repeat
Glen Rose · one lap
Distance50km
Start · finishOne lap · elevation
0 kmDrag map to rotate10.6 km
Weather
Early-October, Glen Rose
30°CTypical high
16°CTypical low
4°CColdest in 20 years
23%Days with rain
Highs around 30°C and lows around 16°C, but it has dropped to 4°C. Rain on 23% of days.
NASA POWER data, 2006-2025, the week either side of race day
Results
Course verified. Results not yet available.
Organiser
Training
Training for the The Mammoth Trail Run 50 km
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a The Mammoth Trail Run 50 km plan targets
Typical sessions
50 km
Time on feet and fatigue resistance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long runs that build time on your feet
Tempo and threshold sessions to hold race pace
Back-to-back weekend runs for fatigue resistance
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your The Mammoth Trail Run 50 km plan.
7-day free trial, no card required.
Other races at The Mammoth Trail Run
More events in October in United States
DC PeaksExpected Early October 2027 · Salt Lake City→Above the Clouds UltraExpected Early October 2027 · Salt Lake City→Angeles Crest 100 Mile Endurance RunSat, 2 Oct 2027 · Altadena→Arkansas High Country RaceExpected Early October 2027 · Bentonville→Bear Brook ClassicExpected Early October 2027 · Allenstown→Bear Brook ClassicExpected Early October 2027 · Allenstown→
