All-Out Mardi Crawl

Get ready for the 11th annual Mardi Crawl, where we blend a wonderful winter run with a festive Mardi Gras celebration, Colorado-style! From our new venue at Colorado Tap House, you can tackle relatively gentle 5K and 10K courses on the acclaimed Ralston Creek Trail, through shady, creekside beauty along Arvada’s picturesque open spaces and charming golf course communities. Alternatively, for the more adventurous athlete, challenge yourself with our half marathon course, which combines the beauty of the Ralston Creek Trail with the rigorous Blunn Reservoir loop, offering gorgeous Denver and Front Range views. Mardi Crawl is also an official BOLDERBoulder Qualifying event! Use your finish time from any distance in this race to qualify for BOLDERBoulder’s qualified waves. This is a can’t-miss opportunity to experience the best of what Colorado has to offer!

This family- and dog-friendly event includes:

The flexibility of running or walking 5K, 10K, or half marathon distances to meet your fitness goals and so you can participate with your friends and family
An awesome, super-soft sweatshirt, full-color medal, and event-specific bib for all distances
Chip timing and accurately measured courses
Awesome post-race meal including breakfast burrito and hot cider
Amazing after-party at the Colorado Tap House
Lots of free course and finish line photos

We are inclusive and support athletes of all abilities, including no time limit on the run/walk

Save 25% by registering for all three All-Out winter events at the same time!

Doug Demusz

Doug Demusz, a passionate lifetime member of Colorado's outdoor community who enjoys backpacking, adventure cycling, backcountry skiing, along with creating music, and a well rounded appreciation of literature, and community events.