Seth McConnell, The Denver PostRunners stand at the start line as they wait for the start of the Colfax Marathon at City Park on May 21, 2017, in Denver, Colorado. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon. (Photo by Seth McConnell/The Denver Post)
Seth McConnell, The Denver PostRunners cast long shadows as they make their way through the Denver Zoo during the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostRamon Paredes Becerra of Mexico raises his hands in the air as he crosses the finish line in first during the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostBrittany Lee raises her hands in the air as she crosses the finish line in first during the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostLeah Beisner, left, and Zonia Valenciano check their phones as they warm up before the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostSarah Villasenor stretches as she warms up for the half marathon during the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostAaron Pendergraft and Colin Meyer sit in the starting area as they wait for the start of the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostRunners prepare as they wait for the start of the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostRunners wait the start line for the start of the half marathon during the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostRunners prepare as they wait for the start of the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostRunners sprint from the start line during the start of the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostA runner carries an American flag as she sprint from the start line during the start of the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostAshok Vasan, 12, warms up before running the half marathon of the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostNathaniel Waite-Lutz, 11, gives high fives and encouragement to runners as they make their way through the Denver Zoo during the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostA runner grabs a bottle of water out of a tub after finishing the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostRunners make their way across the finish line during the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostRunners make their way across the finish line during the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostRunners make their way through the Denver Zoo during the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostA volunteer holds an arm full of finisher medals during the Colfax Marathon at City Park on May 21, 2017, in Denver.The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostA runner yells after crossing the finish line during the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostRunners make their way across the finish line during the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver PostStephanie Hickey, right, comforts Kristi Dougherty on a tough race after they crossed the finish line during the Colfax Marathon at City Park on May 21, 2017, in Denver. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon.
Seth McConnell, The Denver Post
1 of 22
Runners stand at the start line as they wait for the start of the Colfax Marathon at City Park on May 21, 2017, in Denver, Colorado. The 12th annual Colfax Marathon took thousands of runners on an urban tour of Denver, including a run through the Denver Zoo for those participating in the half marathon. (Photo by Seth McConnell/The Denver Post)
ExpandBy The Denver Post | newsroom@denverpost.com | The Denver Post
PUBLISHED: | UPDATED:
Getting your player ready...
Photos from the 12th annual running of the Colfax Marathon in Denver on May 21, 2017.
For the .




















