E-Bike Laws in Marin County, California
Marin County is the only place in California where riders under 16 are barred from Class 2 e-bikes, and the only place where helmets are required on Class 2 at every age. Both come from Veh. Code § 21214.5, a pilot statute created by AB 1778 (2024) that applies to Marin County alone. The county ordinance took effect July 1, 2025, and all eleven Marin municipalities adopted parallel rules by September 14, 2025. The fine is $25 after a 60-day warning period, dismissible on proof of a safety course. The statute sunsets January 1, 2029. Separately, Class 3 is banned from county paved pathways (15 mph limit), and the Marin County Open Space District bans e-bikes outright across roughly 180 miles.
The Assembly Transportation Committee's April 20, 2026 analysis of AB 2595 states that the Marin pilot has "no specified sunset date." AB 1778's chaptered text says Veh. Code § 21214.5 "becomes inoperative and is repealed on January 1, 2029." Marin County's own public page also omits the sunset. The bill text is the better authority — the committee analysis appears to be in error. Separately, the county's own ordinance number and code section for the pilot could not be found; Granicus and Municode are both blocked to retrieval. A Clerk of the Board request is needed.
The rules, line by line
| Subject | Rule | Authority |
|---|---|---|
| Minimum age, Class 2 | Unlawful for a person under 16 to operate a Class 2 e-bike. Effective July 1, 2025. | Veh. Code § 21214.5 (AB 1778) |
| Helmets, Class 2 | Required for all Class 2 riders and passengers regardless of age. | Veh. Code § 21214.5 |
| Fine and dismissal | $25 infraction; first 60 days warnings only. A parent or guardian can avoid the record and fee by showing, within 120 days, completion of an e-bike safety course or a helmet purchase plus a local bike-safety course. | Veh. Code § 21214.5 |
| Sunset | The enabling statute becomes inoperative and is repealed January 1, 2029. Report due to the Legislature by January 1, 2028. | Veh. Code § 21214.5 |
| County paved pathways | Class 1 and Class 2 permitted on county-maintained paved multi-use pathways and Marin County Parks parking lots; Class 3 prohibited on paths (roads, bike lanes and bike routes only). Board action September 24, 2019. | Marin County Ord. 3711, § 10.05.030Citation unconfirmed |
| Pathway speed limits | 15 mph on county pathways; 10 mph on the Bayfront Park segment of the Mill Valley–Sausalito Path. | no citation locatedCitation unconfirmed |
| Open Space District | "Electric bicycles are not allowed on District lands." Conventional bikes limited to fire protection roads, designated bicycle pathways, or public roads not signed against such use. Covers roughly 180 miles. | Marin County Code Title 10; Appendix ACitation unconfirmed |
| Marin Water watershed | E-bikes prohibited on Mt. Tamalpais watershed lands except public roads and parking lots. A revised Class 1 pilot permits Class 1 only on watershed fire roads where conventional bikes are already allowed — begun July 1, 2025, running up to two years. | no citation locatedCitation unconfirmed |
| County ordinance number | Not found. The Board's ordinance number and the codified chapter for the AB 1778 pilot could not be retrieved. | no citation locatedCitation unconfirmed |
Marin has authority no other California county has
Veh. Code § 21214.5, added by AB 1778 (Connolly), Ch. 1005, Stats. 2024 and signed September 30,
2024, authorizes Marin County (unincorporated) and any local authority within Marin County — and
no one else — to adopt ordinances barring under-16 riders from Class 2 e-bikes and requiring
helmets on Class 2 at every age.
That exclusivity is the single most important fact about Marin's rules. If you read that California
has an under-16 e-bike rule, it applies in Marin County and nowhere else. San Diego County has a
separate and different pilot under § 21214.7 covering under-12 on Class 1 and Class 2. Every
other California city and county lacks the authority — as the City of Santa Cruz discovered in March
2026, when it adopted a minimum age and then found it could not enforce one.
The statute builds in procedural requirements: a public information campaign of at least 30 days before enactment, a 60-day warning-only period, a $25 infraction thereafter, a fine-avoidance path, a report to the Legislature by January 1, 2028, and repeal on January 1, 2029.
All eleven municipalities adopted it
| Jurisdiction | Effective |
|---|---|
| Tiburon, Belvedere, Mill Valley, Corte Madera, Larkspur, Fairfax, San Anselmo | July 1, 2025 |
| Sausalito | August 1, 2025 |
| Novato | August 22, 2025 |
| San Rafael | September 2, 2025 |
| Ross | September 14, 2025 |
Unusually complete county-wide coverage — compare San Diego County, where nine jurisdictions adopted its pilot, two expressly declined and several have not acted.
The ordinance numbers and municipal code sections for all eleven could not be found. Marin municipal websites run on platforms that block automated retrieval and the new chapters are not indexed. Every one needs a clerk-level lookup, and none is published here as a guess.
Mill Valley also took a second reading of a separate "E-Bike Ordinance" on April 3, 2023, predating AB 1778. Its contents are entirely unverified.
How it is actually enforced
This is the part that matters practically, and Marin has been unusually candid about it.
The rule is enforced as a secondary infraction. County staff have stated that "children will not be stopped based on their perceived age," and that officers address it only incident to another stop. Marin officials have told other jurisdictions considering similar rules — including the City of Santa Cruz — that proactive enforcement is unrealistic given police resources, and that the program is education-first.
That is a sensible position and it anticipates the objection Imperial Beach raised when declining San Diego County's pilot: an age rule enforced by visual estimation of a child's age requires stopping children based on how old they look, and both pilot statutes require the adopting agency to report demographic data on persons stopped.
Three separate regimes in one county
A rider in Marin is potentially under any of three sets of rules, with different answers:
1. The AB 1778 age and helmet pilot — under 16 barred from Class 2, helmets on Class 2 at every age. Applies county-wide including all eleven towns.
2. County paved pathways — from a September 24, 2019 Board action, Class 1 and Class 2 are
permitted on county-maintained paved multi-use pathways, Class 3 is prohibited, and the limit
is 15 mph (10 mph on the Bayfront Park segment of the Mill Valley–Sausalito Path). The citation
Marin County Ordinance 3711, § 10.05.030 comes from a Town of Los Gatos staff-report survey and is
unverified.
3. Marin County Open Space District — "Electric bicycles are not allowed on District lands," full stop, across roughly 180 miles of fire roads and trails. This is one of the three strictest e-bike regimes in Northern California.
The Open Space ban is under active reconsideration for Class 1. The Parks and Open Space Commission discussed it on May 21, 2026, ran a public survey over summer 2026, and a staff report on public input was due September 2026, with a Commission decision to follow. No change has been adopted.
And a fourth, on Mt. Tamalpais
Marin Municipal Water District is a separate agency with its own rules, and its recent history is instructive.
Baseline: e-bikes prohibited on watershed lands except public roads and parking lots. In September 2024 the Board approved a Watershed Trail Sharing Pilot and a Class 1 E-Bike Trial. On October 1, 2024 the California Native Plant Society, Marin Audubon Society and Marin Conservation League sued, alleging CEQA violations. On October 3, 2024 a temporary restraining order halted both programs before implementation.
On May 7, 2025 the Board rescinded both 2024 pilots and approved a narrower revised Class 1 pilot: Class 1 only, on watershed fire roads where conventional bikes are already allowed, beginning July 1, 2025 and running up to two years — so through roughly mid-2027. Single-track access was deferred. Monitoring includes trail counters, visitor surveys, and bat and Northern Spotted Owl studies.
This is the only documented case in California of e-bike trail access being halted by litigation. Anyone planning to expand e-bike access on public land should read it as a CEQA warning.
Common questions
How old do you have to be to ride a Class 2 e-bike in Marin County?
- Marin County and all eleven of its municipalities prohibit riders under 16 from operating Class 2 e-bikes, under the pilot authority of
Veh. Code § 21214.5— created by AB 1778 for Marin County alone. Class 1 has no minimum age. The county ordinance took effect July 1, 2025 and the statute sunsets January 1, 2029.
Do adults need a helmet on a Class 2 e-bike in Marin County?
Yes. Marin's ordinance requires helmets for all Class 2 riders and passengers regardless of age — the only such rule in California. Statewide, helmets are required only for riders under 18, plus all ages on Class 3. The Class 2 all-ages requirement comes from the same AB 1778 pilot authority.
Are e-bikes allowed on Marin County Open Space trails?
No. The Marin County Open Space District states plainly that "electric bicycles are not allowed on District lands" — roughly 180 miles of fire roads and trails. Whether to permit Class 1 is under active reconsideration, with a Commission decision pending after a summer 2026 public survey, but no change has been adopted. Separately, county- maintained paved pathways do permit Class 1 and Class 2 at 15 mph, with Class 3 prohibited.
What is the fine for a Marin e-bike age or helmet violation?
$25, after a 60-day warning-only period. A parent or guardian can avoid the record and the fee by showing, within 120 days, completion of an e-bike safety course, or a helmet purchase plus a local bike-safety course. In practice the rule is enforced as a secondary infraction — county staff have stated that children will not be stopped based on their perceived age.
Can you ride an e-bike on Mt. Tamalpais?
Only a Class 1, and only on fire roads where conventional bikes are already allowed, under Marin Municipal Water District's revised pilot running from July 1, 2025 for up to two years. The district's baseline rule prohibits e-bikes on watershed lands except public roads and parking lots. Two earlier 2024 pilots were rescinded in May 2025 after a CEQA lawsuit and a temporary restraining order.