Ada County, ID Mobility & Curb Rules: Bike Lane Rules (2026)

Ada County's Greenbelt, the paved multi-use path running along the Boise River, and the county's other designated bike paths carry a courtesy-based speed rule rather than a numeric limit. Ada County Code 2-2-6(E), titled Control Of Speed, tells Greenbelt and bike paths users to act responsibly and courteously and not exceed a safe and prudent speed, and specifically names cyclists, e-bike operators, scooter riders, skateboarders, roller skaters, and in-line skaters as the classes of users the rule reaches. The standard is whether the speed endangers or injures another user, not a set mile-per-hour figure, so enforcement turns on how a particular rider behaved around pedestrians, families and slower cyclists sharing the path.

Subsection J separately addresses obstruction and surface misuse: no one may ride or operate a skateboard, roller skates, scooter, in-line skates, bicycle, or other wheeled recreation equipment on a concrete sidewalk, curbing, ornamental surface, hand railing, picnic table, bench, sport court, playground area, planter, sculpture, or similar structure, unless the Director has posted that area as open to wheeled devices. Subsection F adds a narrower equipment ban: no ski poles or push poles on the Greenbelt or bike paths, except cross-country skiers in sufficient snow and land paddlers using a rubberized-footer pole that will not damage the pavement.

Separately, Ada County Code 2-2-10(E) sets a parallel Greenbelt speed duty for all users, requiring reasonable and prudent travel given actual and potential hazards, and escalates a violation from an infraction to a misdemeanor if the reckless travel also endangers a person or property.