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GDT > RTD Routes > Route 15 – East Colfax Avenue

A bus at Union Station.
A bus at Union Station.

Route 15, ‘East Colfax Avenue’, Denver Union Station to Colfax / Billings. It is Denver’s busiest bus route and arguable its most infamous.

Map & Schedule

A Line map.

Route 15 operates 7 days a week. Frequency is generally 10 minutes throughout the day, dropping to 15 minutes in the evenings.

Route Schedule
NextRide

Vehicles Used

Gillig 40ft Low Floor transit bus.
Gillig 40ft Low Floor transit bus.

The route is operated by RTD using Gillig 40ft Low Floor transit buses from East Metro Garage, Denver.

Ridership

YearTotal
2018,000
2019,000
2020,000
2021,000
2022,000
2023,000
Annual Ridership

Current Issues

This route suffers from poor scheduling at ? Station, here buses are timed to depart 3 minutes before W Line trains arrive.

Future Plans

Routes 15 and Route 15L are both due to be replaced by the Colfax Lynx BRT service from January 2027.

The System Optimization Plan details no proposals to change this route.