All-Out Dog Days

All-Out Dog Days is an annual running event held in Westminster, Colorado, along the scenic Big Dry Creek Trail, located between Denver and Boulder. The event features multiple race distances including a half marathon, 10K, and 5K, with both in-person and virtual participation options. Runners enjoy a course with soft trail surfaces ideal for dogs, and stunning views of the Flatirons.

Special features include a dog division awarding the fastest canine runners and a dog-themed costume contest, making it a fun experience for both humans and their pets. The event supports Do Over Dogs, a charitable organization, and serves as a qualifier for the BOLDERBoulder race. Visit the organization's website for the most recent information.