Half Marathon

A brand new course for the 15th anniversary that takes runners through Denver Zoo and Downtown Denver!

New this year, you’ll experience vibrant Colfax with iconic spots like VooDoo Donuts, Irish Snug, and Cathedral Basilica.  The new course also takes you by the Capitol, Civic Center Park, 16th Street Mall, Convention Center, stellar Colorado mountain views, and the Cherry Creek Bike Path.  While you’re running through downtown, you’ll run through Denver Fire Station #1 and get high-fives by a row of firefighters.  This is the only race in the country with a fire station run-through!

A runner favorite, the new course keeps the epic mile in Denver Zoo, a once-a-year chance for you to be watched by rhinos, elephants, camels, monkeys, tigers, and more.  The Denver Colfax Half Marathon is the only race to run through Denver Zoo!

Oh yeah, our friends from the Colorado Firefighter Calendar are back on the course, too, providing you encouragement!

The homestretch will be running along 17th Street, then 17th Avenue, passing restaurants and historic buildings, before entering Denver’s beautiful City Park for a great after party on the lake with over 20,000 new friends.

Mile by mile details and map

Video and Virtual Photo Tour

Our 30 second video tells all!  Click here to check out the Colfax Half.  Cruise to the bottom of the page to take a virtual photo tour of the sites on the course!

Runner Perks, Medal & Shirts

Tech race shirts and awesome finisher medals with detachable mini-medallions for your keychain or necklace.  Free runner tracking and digital on-course photos!  Virtual race bag with great offers.  Don’t miss the awesome afterparty and Michelob Ultra Beer Garden lakeside in City Park.


Set a new event record, win $1,000.  Set a new state record, win an additional $1,000.  See the times to beat here.  Age group awards are great keepsakes!  Overall and masters awards are based on gun time (1st, 2nd, 3rd).  Age group awards are by chip time (1st, 2nd, 3rd) in categories: 19 & under, 20-29, 30-39, 40-49, 50-59, 60-69, 70+.  Athletes with disabilities click here for details regarding awards categories.

Run for Charity

Run for one of the largest Charity Partner programs in the country!  Over 200 charities participated in 2019.  Choose a charity to run for when you register, and they will contact you

Training & Runs

Announcing the Colfax Training Series!  Our Colfax Marathon Ambassadors will join Featured Running Clubs and running stores with Colfax drawings for great schwag.  Check the TRAINING section for the up-to-date calendar and great training tips.

Packet Pick Up & Race Day Logisitics

Pick up Race Packets Friday and Saturday before the race at the Health & Fitness Expo.  No Race Day Packet Pick Up.  Detailed race day logistics will be posted in April.