North AmericaUnited States

Denver Marathon

Denver's flagship, run a full mile high where the thin Colorado air is the real test.

6.0/10 Difficulty
215m Elevation Gain
2006 Founded

Course Map

Elevation Profile
km
mi

About this Race

The DICK'S Sporting Goods Pittsburgh Marathon is a genuinely challenging course through the self-styled City of Bridges, crossing the rivers repeatedly and rolling over the hilly terrain that defines the western Pennsylvania city. The numerous bridge climbs and undulating neighborhoods make it far harder than a flat record course, demanding disciplined pacing throughout. Held in May, it draws big, famously raucous crowds that give it some of the loudest support in American running. The hills reward restraint and punish anyone who attacks early. It suits strong, hill-ready runners who want a tough, spirited race with thunderous crowd energy over a personal best.

city altitude flat urban

Course Insight

Colfax is the Mile-High marathon, and that altitude around 1,600 metres is the defining feature, thinning the air enough to punish any sea-level pace. Throw out your usual splits and run by effort, going out deliberately easy through the flat Denver streets. The thin air bites hardest if you push early. May conditions are otherwise runnable. Respect the altitude from the gun and you'll finish strong rather than fading.

Pro tip: Throw out your usual splits and run by effort — the mile-high air rewards an easy start far more than early ambition.

Difficulty Breakdown

6.0/10

Mostly due to tough late hills, lots of turns.

Elevation
5.2
Hill Placement
7.2
Weather
0.1
Turns
5.0

Altitude multiplier: ×1.34 (course above 1,500 m)

How we calculate difficulty →

Course Details

Course type
Loop
Elevation gain
215m
Elevation loss
215m
Highest point
1691m
Lowest point
1579m
Net drop
112m
Start
East side of Ferril Lake in City Park
Cutoff time
6h 0m

Race History

The Colfax Marathon was first held in 2006 as Denver's flagship road race, run a full mile above sea level where the thin Colorado air is the defining challenge. Its course along Colfax Avenue and through City Park built its identity around the high-altitude test. From its founding it grew into the Mile High City's signature marathon. Held each May, it draws a field to the Colorado capital.

Plan Your Trip

Everything you need to know to get there, get settled, and get to the start line.

Nearest airport(s)
Denver International (DEN)
Best area to stay
LoDo downtown for proximity to the route and full hotels, the City Park area for proximity to the course, and Capitol Hill for characterful, value stays.
Getting to the start
The start is in City Park; take the RTD light rail or a short rideshare to the park, or walk from nearby neighbourhoods.

You might also like

Madrid Marathon
Madrid, Spain
6.5/10
Stockholm Marathon
Stockholm, Sweden
Debut 4.9/10
Cape Town Marathon
Cape Town, South Africa
Major PB Debut 5.9/10
Helsinki City Marathon
Helsinki, Finland
PB Debut 7.3/10
Prague Marathon
Prague, Czech Republic
PB Debut 4.5/10
Jakarta Marathon
Jakarta, Indonesia
5.3/10
San Francisco Marathon
San Francisco, United States
Debut 6.7/10
Pittsburgh Marathon
Pittsburgh, United States
Debut 5.7/10
Atlanta Marathon
Atlanta, United States
Debut 6.8/10
Oklahoma City Memorial Marathon
Oklahoma City, United States
Debut 4.8/10
St. Louis Marathon
St. Louis, United States
Debut 5.5/10
Mexico City Marathon
Mexico City, Mexico
6.9/10
Marine Corps Marathon
Washington DC, United States
Debut 4.8/10
Dublin Marathon
Dublin, Ireland
Debut 4.5/10
Oslo Marathon
Oslo, Norway
Debut 7.0/10
Singapore Marathon
Singapore, Singapore
5.0/10
Casablanca Marathon
Casablanca, Morocco
PB Debut 4.7/10
Dallas Marathon
Dallas, United States
Debut 4.8/10
Kansas City Marathon
Kansas City, United States
Debut 4.8/10
Portland Marathon
Portland, United States
PB Debut 6.0/10
Paris Marathon
Paris, France
Debut 4.4/10
Boston Marathon
Boston, United States
Major 5.1/10
Rome Marathon
Rome, Italy
Debut 3.9/10
Los Angeles Marathon
Los Angeles, United States
Debut 6.0/10
Barcelona Marathon
Barcelona, Spain
PB Debut 3.0/10
Big Sur Marathon
Big Sur, United States
6.9/10
Santiago Marathon
Santiago, Chile
Debut 4.0/10
Rock 'n' Roll San Diego Marathon
San Diego, United States
Debut 7.0/10
Rock 'n' Roll Nashville Marathon
Nashville, United States
Debut 6.6/10
Cleveland Marathon
Cleveland, United States
PB Debut 3.9/10