A group of runners on a City Park path on a clear Denver morning, the downtown skyline and the snow-capped Front Range behind them

Running in Denver and Colorado

Running in Denver is its own sport. The air is thin, the weather turns on a dime, and there’s a race almost every weekend from spring to the holidays.

Feat on the Street is a clear, honest guide to running and racing here, for locals and for anyone planning a trip to the Mile-High City.

Start here

A group of runners on a flat path in a Denver park

Race Guides by Season →

Which races are worth your morning, sorted spring to winter.

Two runners on a path beside a Denver lake with the skyline behind

Where to Run in Denver →

The city’s best routes, from flat lake loops to long car-free trails.

A lone runner on an open path under a big Colorado sky

Running at Altitude →

What the thin, mile-high air does to your pace, and how to adjust.

Running here is different

Altitude changes your pace. At a mile up there’s less oxygen in every breath, so run by effort, not your sea-level numbers. Here’s what the thin air actually does.

The weather won’t read the forecast. A start line can sit near freezing and finish in sun. Dress for the start you’ll stand on, then shed.

No hype, no events

Feat on the Street is a running resource, not a race company. We don’t host events or take registrations. We compile what’s worth knowing about running here and point you to the races and routes that genuinely exist.