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B360 - Circle Boulder by Bicycle

Coordinated in partnership with Community Cycles, the Circle Boulder by Bicycle ride is part of Walk and Bike Month, a signature community event designed to support the city's sustainability and Transportation Master Plan goals. Visit to view a complete list of Walk and Bike Month events going on around Boulder.

The City of Boulder/GO Boulder Transportation Division will host the 20th annual Circle Boulder by Bicycle community ride on Sunday, June 3, 2018 , with registration and rolling starts between 10 a.m. and noon at Valmont Bike Park , located along Airport Road near the intersection of  Airport Road and Butte Street. 

The leisurely, B360 and B180 self-guided rides will explore the city's extensive bike system of multi-use paths, protected bicycle lanes, buffered bike lanes and on-street bike lanes throughout the city and then return to Valmont Bike Park for a FREE, post-ride party with refreshments. The FREE, non-competitive bike ride is open to all ages and abilities and will take place rain or shine. 

Let us know that you're coming by registering here for free.

Information about parking pdf at the B360.

The B360 and B180 Bike Route

The B360 and B180 routes use the community's bike system of connected paths, neighborhood streets and unpaved trails. Riders can register for free on the day of the event at the Valmont Bike Park and then begin riding by yourself or with a group of friends.

The B360 is a 22-mile bike route and riders are encouraged to begin between 10 and 11 a.m.

Riders who want to bike the 11-mile B180 bike route can begin riding between 11 a.m. and noon. 

Both the B360 and B180 routes are designated to be ridden clock-wise and start and end at the Valmont Bike Park.

Download and view a PDF map of the 2018 route pdf.

The interactive map below displays the 2018 route.

View larger map

Walk 360

Walk 26 miles all the way around Boulder throughout Walk and Bike Month with Boulder Walks! We will walk every Sunday morning in June , from 9 am to about noon , finishing each walk at or near places to enjoy lunch together. Or join us for the 'Slow Marathon' on June 20 and walk 26 miles in one day. Along the way, we'll explore Boulder history and innovation, learn about the city's work to integrate more walkable and transit-accessible places into every neighborhood, and get in more than 10,000 steps together! Bus tickets will be provided to help you get back to our starting places; carpooling is also encouraged. Visit Boulder Walks for more information on all the walks going on around Boulder and also visit  for all the special June Walk and Bike month events!

Secton 1, June 3 : Four Mile Creek Trailhead to Valmont Bike Park (5.5 miles)

Section 2, June 10 : Valmont Bike Park to Southern Sun Pub & Brewery (8.2 miles)

Section 3, June 17 : Lucky's Market South Cafe to Chautauqua Dining Hall (6.5 miles)

Section 4, June 24: Chautauqua Park Ranger's Cottage to Lee Hill Trail Head Lot (5.5 miles)

Full loop, June 30: The Slow Marathon starts and ends at Four Mile Creek Trailhead (26 miles)

Tips and Rules

Riders are asked to remain on designated bike routes and yield to pedestrians and all other users. Cyclists should carry plenty of water and wear appropriate gear, including a helmet. Dogs are not allowed at this event. 

Please be cautious of potential flooding at the following underpasses:

  • Along the Boulder Creek Path south of Pearl Pkwy.
  • Baseline just before the Bobolink Trailhead
  • Skunk Creek path at Colorado
  • Boulder Creek Path at Boulder High School
  • Boulder Creek Path at Arapahoe

Participants tour Boulder using the community’s bike system of connected paths, neighborhood streets and unpaved trails. Riders are asked to remain on designated bike routes and yield to all other users.

Five Rules of the Road to prepare you for safe and fun bicycling no matter where you're riding:
Your safety and image of bicyclists depend on you. You have the same rights and responsibilities as drivers. Obey traffic signals and stop signs. Ride with traffic; use the rightmost lane headed in the direction you are going.

Make your intentions clear to everyone on the road. Ride in a straight line and don’t swerve between parked cars. Signal turns, and check behind you well before turning or changing lanes.

Ride where people can see you and wear bright clothing. Use a front white light, red rear light and reflectors when visibility is poor. Make eye contact with others and don’t ride on sidewalks.

Anticipate what drivers, pedestrians, and other people on bikes will do next. Watch for turning vehicles and ride outside the door zone of parked cars. Look out for debris, potholes, and other road hazards. Cross railroad tracks at right angles.

Check that your tires are sufficiently inflated, brakes are working, chain runs smoothly, and quick release levers are closed. Carry tools and supplies that are appropriate for your ride. Wear a helmet.

Photos from previous B360: Circle Boulder by Bicycle events