Date
Sat, 10 Apr 2027
Start
09:00
Venue
Castell General Store, Castell, Texas
Castell, Llano County
Countdown
April
The full Grind is a figure-eight gravel loop with a noon checkpoint at Castell, and only modest climbing. It is the long day out, not the steep one.
Key facts
01Noon cut-off at Castell midpoint to continue onto the north loop
02Carry your own food, water and gear
03Open to vehicle traffic, so road laws apply
Create a free training plan for the Castell Grind 100 km
7-day free trial, no card required
The course
The route
Castell
Distance100km
Total climb595m
StartElevation
0 kmDrag map to rotate99.6 km
Weather
Early-April, Castell
27°CTypical high
12°CTypical low
-1°CColdest in 20 years
21%Days with rain
Highs around 27°C and lows around 12°C, but it has dropped to -1°C. Rain on 21% of days. Pack for the cold end, not the average.
NASA POWER data, 2006-2025, the week either side of race day
Organiser
OrganiserCastell Grind Crew (Mike, Debbie and Janie)
Websitecastellgrind.com
Instagram@castellgrind
Running since2014
Training
Training for the Castell Grind 100 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 Castell Grind 100 km plan targets
Typical sessions
100 km with 595 m of climbing
Endurance and fatigue resistance over the full distance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long endurance rides building toward the full distance
Threshold and sweet-spot work for sustained power
Group rides for drafting and bunch-riding skills
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 Castell Grind 100 km plan.
7-day free trial, no card required.
Other races at Castell Grind
More events in April in United States
Bedrock Valley Trail RunsSat, 3 Apr 2027 · Hemet→Behind the Rocks UltraSat, 3 Apr 2027 · Moab→Mt. Toby Ultra & Trail RacesExpected Early April 2027 · Sunderland→Mudslinger XCSat, 3 Apr 2027 · Blodgett→OC MTB Saddleback XC RaceExpected Early April 2027 · Saddleback Wilderness→Rough Road 100Expected Early April 2027 · Morris→
