State has a Far Right as Practicable Requirement

A bicyclist traveling slower than normal traffic must ride in the right-hand lane, riding as far right as the rider judges safe to facilitate overtaking traffic. Exceptions apply when passing, preparing to turn left, avoiding hazards, or when the lane is too narrow to share safely.

Allows Two Abreast Riding

Colorado allows bicyclists to ride two abreast within a single lane, provided they do not impede the normal and reasonable movement of traffic.

Single File is Required

Colorado does not require single-file riding. Cyclists may ride two abreast within a single lane as long as they do not impede the normal flow of traffic.

Has a Safe Passing Law

Colorado's Three Foot Law requires motorists to provide at least three feet of clearance when passing a bicyclist. If sufficient clearance is not available, the driver must reduce speed and wait for a safe opportunity to pass.

Helmets are required on the road

Colorado has no statewide helmet requirement for riders of conventional bicycles. Riders and passengers under age 18 must wear a helmet when operating or riding a Class 3 electric bicycle.

If Bike Lanes are present, they are required ( except when unsafe )

Colorado does not require bicyclists to use a bike lane merely because one is available; § 42-4-1412 governs lane positioning generally but imposes no bike-lane-use mandate.

Riders may use the sidewalks

Sidewalk riding is generally allowed unless prohibited by local ordinance or signage. Riders must yield to pedestrians and give an audible signal before overtaking.

Does the Impeding Statute Apply to Bikes

Colorado requires a slower-moving bicyclist to facilitate overtaking traffic by riding toward the right side of the lane when it is safe to do so, but cyclists may use more of the lane whenever safety conditions require it.

Whether cyclists may treat stop signs as yield signs (the "Idaho stop").

Colorado's Safety Stop law lets bicyclists aged 15 and older, or younger riders accompanied by an adult, treat a stop sign as a yield sign after slowing to 10 mph or less and yielding the right-of-way. Red lights still require a full stop before proceeding.

Restrictions exist on e-bikes and usage

Colorado recognizes Class 1, 2, and 3 electric bicycles, each limited to a 750-watt motor. Class 3 e-bikes are restricted to roads and specifically authorized paths, and riders and passengers under 18 must wear a helmet when operating one. The class definitions and the 750-watt limit are in C.R.S. § 42-1-102(2.4)-(2.5.5); the path, age, and helmet restrictions are in § 42-4-1412(14)-(15).

Allows the concept of Contributory Negligence that allows any contributory fault resuls in 'no fault'

Colorado does not use contributory negligence. It follows a modified comparative negligence system: an injured cyclist may recover damages if their share of fault is less than the defendant's, with damages reduced by the cyclist's percentage of fault; recovery is barred if the cyclist's fault equals or exceeds the defendant's.