REGISTRATION OPENS NOVEMBER 1st 2025 at NOON

REGISTRATION OPENS NOV 1, 2025 at NOON

Standard Registration 
$95 for the 62 miles
$80 for the 45 miles
$65 for the 31 miles

Last minute late registration will be made available only after the waitlist has been emptied.  

NOTE: Late spots are rare and not guaranteed. Email castellgrind@gmail.com for all requests.

Each race is strictly capped due to venue capacity.
Typically the Castell Grind sells out in about an hour with a waitlist.

Please register early to ensure a spot in this year's race.  

THERE IS NO RACE DAY REGISTRATION.

• Saturday, November 1, 2025  - Online registration opens at noon.
• Sunday, March 1, 2026 - Last day to request a refund
• Friday, March 27, 2026 - Last day to request a deferment to 2027
• Sunday April 6, 2026 - Last day for registration transfers
• Sunday, April 6, 2026 - Early bird packet pick up -  Trek Austin south Lamar from Noon - 3:30pm 
• Friday, April 10, 2026 - Packet pick up in Castell from 4:30pm to 8:30pm at the yellow barn
• Saturday April 11, 2026 - Race day packet pick up in Castell from 6:30am to 8:25am at the yellow barn

• Saturday, April 11, 2026 - 12th Annual Castell Grind race day 9:00am start

• Saturday, April 11, 2026 - Post race food, drink and celebration begins at 11:00 am at the Castell General Store. Award times to be announced.

We could always use a few good volunteers.  If you volunteer you will earn yourself a FREE spot into next year's race.