The Flatiron Flyer (FF) is RTD’s Bus Rapid Transit service along Highway 36. It includes six route options. For specific routes, schedules and details, visit the Flatiron Flyer webpage.
Flatiron Flyer Routes
- FF1 – Downtown Boulder to Denver’s Union Station (all 6 BRT stops)
- FF2 – Express to Denver with stop at McCaslin (CU Denver)
- FF3 – Broomfield to Denver
- FF4 – Boulder Junction to Denver Civic Center Station
- FF5 – Downtown Boulder to Anschutz Medical Center
- FF6 – Denver Union Station to Boulder Junction (East Campus)
To the Airport (DIA) – SkyRide
With one stop adjacent to CU Boulder at 16th and Broadway, the SkyRide leaves hourly from Boulder Station, 18 times a day. Free with an EcoPass or College Pass. Visit RTD’s SkyRide website for more details.
To Longmont & Fort Collins
Bus Routes North
- BOLT - Longmont via 28th then Diagonal Hwy
- J (Route) - Longmont via Foothills Parkway, Jay Rd, Gunbarrel, Diagonal Hwy
- FLEX - Fort Collins - Loveland - Longmont - Boulder
For other options between Boulder and Longmont, see the Boulder County Transit Map
- GS (Route) - Downtown Boulder to Golden via Broadway and Highway 93
To the Mountains/Slopes
- N (RTD Ski-n-Ride) – to Nederland and Eldora from Boulder Station
- CU SKI BUS – Students only. Destinations vary. Visit the CU Environmental website's Ski Bus Program for more information.