E-Bike Laws in San Mateo County, California

Q: Is there a minimum age for e-bikes in San Mateo County?

Not yet. AB 2595 would add Veh. Code § 21214.9, letting the county and its cities bar under-12 riders from Class 1 and Class 2 — a third county pilot. It was presented to the Governor on August 25, 2026 with a September 30 deadline, and its fate is unresolved on this page. The statewide Class 3 minimum of 16 applies regardless.

Last verified October 14, 2026·San Mateo County·Edited by Stacy Yamaoka Anderson

San Mateo County's electric micromobility ordinance — to be named after Ayden Fang, the four-year-old killed in a Burlingame e-bike chain-reaction crash — passed its first reading unanimously on August 12, 2026 and takes effect January 2027. It sets a 5 mph speed limit on sidewalks, requires riders to yield to pedestrians and give clear audible signals before passing, prohibits unsafe riding, tampering with serial numbers and blocking sidewalks, and closes the definitional gap for electric motorcycles designed to look like e-bikes. Fines are $50, $200 and $500, with a traffic-safety-education option for a minor's first offense, and the Sheriff gets impound authority. It applies to unincorporated areas only but is expressly drafted as a model for the county's twenty cities.

Not yet in effect, and not yet codified

The ordinance passed its first reading on August 12, 2026 with the second reading pending, and takes effect January 2027. No ordinance number or code chapter could be found because it had not been codified at the time of research. Nothing on this page is currently enforceable. Separately, AB 2595 — which would let San Mateo County jurisdictions bar under-12 riders from Class 1 and Class 2 — was on the Governor's desk with a September 30, 2026 deadline and its fate is unresolved here.

The rules, line by line

Subject	Rule	Authority
Sidewalk speed limit	5 mph. The lowest sidewalk limit in California.	no citation locatedCitation unconfirmed
Yielding and signaling	Riders must yield to pedestrians and give clear and audible signals before passing.	no citation locatedCitation unconfirmed
Prohibited conduct	Unsafe riding, tampering with serial numbers, and blocking sidewalks.	no citation locatedCitation unconfirmed
E-motos	Closes the definitional gap for electric motorcycles designed to look like e-bikes.	no citation locatedCitation unconfirmed
Fines	$50 first violation; $200 second within one year; $500 for additional violations within the year. Minors get a traffic-safety-education option for a first offense.	no citation locatedCitation unconfirmed
Impound	The Sheriff's Office is granted impound authority.	no citation locatedCitation unconfirmed
Scope	Unincorporated county only, but expressly drafted as a model for the twenty cities to adopt.	no citation locatedCitation unconfirmed
Effective	January 2027. First reading passed unanimously August 12, 2026; second reading pending at the time of research; not yet codified.	no citation locatedCitation unconfirmed

5 mph is the lowest sidewalk limit in California

Most jurisdictions that permit sidewalk riding at all set 10 mph: Huntington Beach (HBMC § 10.84.160), Oceanside, Irvine's 2026 amendment. A few set 5 mph in specific contexts — Aliso Viejo, Laguna Woods, Laguna Niguel and Lake Forest all reportedly use 5 mph for sidewalks, and Irvine sets 5 mph in school zones when children are present.

San Mateo County applies 5 mph countywide on all sidewalks. That is walking pace. It is a deliberate statement that a sidewalk is pedestrian space and a bicycle is a guest on it.

The pending AB 2346 would set a statewide prima facie 10 mph sidewalk limit with signage required before enforcement. If signed, San Mateo County's stricter local limit — set before January 1, 2027 — would be grandfathered under the bill's terms.

Named for a child

The ordinance is to be renamed after Ayden Fang, a four-year-old killed in a Burlingame e-bike chain-reaction crash. His father testified before the Board.

It is worth noting what that fact does and does not tell you. Naming an ordinance after a victim is a political act that makes the measure harder to oppose and harder to amend later. It also means the rules were shaped by a single catastrophic event rather than by the aggregate data — and the aggregate data in California consistently points at teenage riders rather than at the adult-and-toddler scenario.

Both things can be true. A 5 mph sidewalk limit is a reasonable rule on its own merits. It is also not the rule the crash statistics would have suggested first.

Serial number tampering is a new idea

Prohibiting tampering with serial numbers appears nowhere else in this survey, and it is aimed at a problem the other ordinances miss: the resale and reclassification market for illegal devices.

The related state provisions: Veh. Code § 24016(d) prohibits modifying an e-bike out of class without replacing the class label; § 24016(e), effective January 1, 2026, prohibits selling any device or app that can modify an e-bike's speed out of class. The pending SB 1167 would go further, requiring brand and manufacturer information on class labels and barring retailers from selling classification labels outside a physical bike shop or repair facility — a direct attack on the counterfeit sticker trade.

San Mateo County's serial-number provision is the local version of the same insight: the enforcement problem is increasingly about device identity, not rider conduct.

Drafted as a model, and that is the point

The ordinance covers unincorporated areas only — but the county drafted it expressly as a model for its twenty cities to adopt.

That is a sensible response to the patchwork problem this site documents everywhere. On the Peninsula, Menlo Park, Redwood City, Burlingame, Mountain View, Santa Clara, Cupertino, Saratoga and San José all have no e-bike ordinance located. Burlingame — the site of the crash that prompted all of this — has no city ordinance; the response came at county level.

A single county-authored template adopted by twenty cities would produce something California currently lacks almost everywhere: a rider crossing a city line without the rules changing.

Compare Marin County, where all eleven municipalities adopted parallel ordinances under the AB 1778 pilot and achieved genuinely uniform county-wide coverage.

The separate age question

AB 2595 (Papan) would add Veh. Code § 21214.9, letting San Mateo County and its cities bar under-12 riders from Class 1 and Class 2 — a third county pilot alongside Marin's § 21214.5 and San Diego County's § 21214.7. It passed the Assembly 65–0 and was presented to the Governor on August 25, 2026, with a report due January 1, 2030 and a sunset of January 1, 2031.

If signed, expect a second wave of county and city ordinances. The county has already shown it will draft a model for its cities.

The open space agency is the strict one

Midpeninsula Regional Open Space District covers much of the county's trail network, and it is one of the three strictest e-bike regimes in Northern California: e-bikes prohibited on essentially all of roughly 160 miles of preserve trails, with limited Class 1 and Class 2 access at only Ravenswood and Rancho San Antonio, and Class 3 prohibited everywhere. The policy was made permanent in June 2022 after a pilot, with no sunset. E-bikes are permitted as an "other power-driven mobility device" for visitors with a mobility disability.

Common questions

When does the San Mateo County e-bike ordinance take effect?

January 2027. It passed its first reading unanimously on August 12, 2026, with the second reading pending at the time of research. Nothing in it is currently enforceable, and it had not been codified, so no ordinance number or code chapter exists yet.

What is the sidewalk speed limit in San Mateo County?

5 mph, once the ordinance takes effect in January 2027 — the lowest sidewalk limit in California, and effectively walking pace. Riders must also yield to pedestrians and give clear audible signals before passing. The pending state bill AB 2346 would set a statewide prima facie 10 mph sidewalk limit, under which San Mateo County's stricter pre-2027 limit would be grandfathered.

What are the fines under the San Mateo County e-bike ordinance?

$50 for a first violation, $200 for a second within one year, and $500 for additional violations within the year. Minors get a traffic-safety-education option for a first offense, and the Sheriff's Office is granted impound authority.

Will San Mateo County cities adopt the same e-bike rules?

That is the explicit intent — the county drafted the ordinance as a model for its twenty cities to adopt. Currently most Peninsula cities, including Burlingame where the crash that prompted the ordinance occurred, have no e-bike ordinance at all. Marin County achieved comparable uniformity when all eleven of its municipalities adopted parallel ordinances under their pilot statute.

Is there a minimum age for e-bikes in San Mateo County?

Not yet. AB 2595 would add Veh. Code § 21214.9, letting the county and its cities bar under-12 riders from Class 1 and Class 2 — a third county pilot. It was presented to the Governor on August 25, 2026 with a September 30 deadline, and its fate is unresolved on this page. The statewide Class 3 minimum of 16 applies regardless.