Castle Rock Trail Festival 50k Half Marathon 10k & 5k

Saturday, October 7, 2023 Castle Rock, CO

Castle Rock Trail Festival 50k Half Marathon 10k & 5k course in Castle Rock, CO

The Castle Rock Trail Festival 50k, Half Marathon, 10k, and 5k is a popular racing event among the trail running community, known for its natural Colorado beauty.

Challenging Course. While the technicalities of the course aren’t so challenging, the altitude alone (6608 feet) makes for a challenging race day, especially for those traveling in from lower altitude locations.

Taking place along Castle Rock’s vast ridgeline trail system in Philip S. Miller Park, runners can expect to enjoy beautiful natural landscapes and trails throughout. With the Fall abloom, the colors should be just as spectacular. 

Oh, and keep your eyes out for the wildlife; from rabbits and foxes to deer and prairie dogs, don’t be surprised if they pop out to say hello! 

All participants receive a custom race shirt, a finisher’s medal (for those who finish, of course), professional chip time, free professional race day photos, and most importantly, post-race refreshments to celebrate. 

Throughout the course itself, several aid stations (6 to be exact) will be posted, comprising all the fueling materials you’ll need to finish in style. 

Race Weather & Climate

Castle Rock is positioned in north-central Colorado, about 30 miles south of downtown Denver, providing a thriving community in the Denver metropolitan area.

October 7 in Castle Rock, Colorado signifies the arrival of fall. High temperatures generally reach around 67°F, providing a pleasantly cool and comfortable atmosphere for enjoying autumn’s charm. As the day gives way to evening, temperatures drop to around 41°F, reminding you that fall nights can be crisp. Precipitation levels are typically modest, with an average of 0.7 inches of rainfall, making it an excellent time to experience the changing foliage and seasonal delights in Castle Rock.

Castle Rock Trail Festival Course Map

Starting Time

The half marathon start time is 8:30 AM.

The course closes at 3:30 PM.


To reserve your spot in the 2023 Castle Rock Trail Festival, you can use the registration link here.

Race Fees

  • There is a $20.00 fee for the liveBIG Family Adventure Run.
  • There is a $35.00 fee for the Philip S. Miller Park 5K.
  • There is a $45.00 fee for the Ridgeline 10K.
  • There is a $65.00 fee for the Ridgeline Trail Half Marathon.
  • There is a $95.00 fee for the Ridgeline 50K.

Castle Rock Trail Festival 50k Half Marathon 10k & 5k Race Website

Castle Rock Trail Festival 50k Half Marathon 10k & 5k Website

See more races in: October, Colorado