E-Bike Rules: Marin County Open Space District
Marin County Open Space District's rule is the bluntest in California: "Electric bicycles are not allowed on District lands." No class exceptions, across roughly 180 miles of fire roads and trails. Conventional bicycles are themselves limited to "fire protection roads, designated bicycle pathways or public roads not signed against such use." The 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. Note that the county's paved pathways are governed separately and do permit Class 1 and Class 2.
The rules, line by line
| Subject | Rule | Authority |
|---|---|---|
| District lands | "Electric bicycles are not allowed on District lands." No class exceptions. | Marin County Code Title 10; Appendix A (Open Space District Code)Citation unconfirmed |
| Conventional bicycles | Limited to "fire protection roads, designated bicycle pathways or public roads not signed against such use." | Marin County Code Title 10Citation unconfirmed |
| Extent | The ban covers roughly 180 miles of open-space fire roads and trails. | not a code provision |
| Class 1 reconsideration | Under active reconsideration for Class 1. Parks and Open Space Commission discussed May 21, 2026; public survey over summer 2026; staff report on public input due September 2026, with a Commission decision to follow. No change adopted. | not a code provision |
| County paved pathways — separate | A different regime: Class 1 and Class 2 permitted on county-maintained paved multi-use pathways and Marin County Parks parking lots; Class 3 prohibited. 15 mph; 10 mph on the Bayfront Park segment of the Mill Valley–Sausalito Path. Board action September 24, 2019. | Marin County Ord. 3711, § 10.05.030Citation unconfirmed |
| Marin Water watershed — separate agency | 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 — from July 1, 2025, up to two years. | no citation locatedCitation unconfirmed |
Three agencies, one county, three answers
A rider in Marin is potentially under any of these, and they do not agree:
1. Marin County Open Space District — all e-bikes banned, roughly 180 miles.
2. Marin County paved pathways — Class 1 and Class 2 permitted at 15 mph (10 mph on the Bayfront Park segment of the Mill Valley–Sausalito Path), Class 3 prohibited. From a September 24, 2019 Board action.
3. Marin Municipal Water District (Mt. Tamalpais watershed) — a separate agency. Baseline prohibition, with a revised Class 1 pilot on fire roads running from July 1, 2025 for up to two years.
And on top of all three, the AB 1778 age and helmet pilot: nobody under 16 on a Class 2, helmets on Class 2 at every age, county-wide including all eleven towns. See the Marin County page.
The Mt. Tamalpais litigation is the cautionary tale
Marin Municipal Water District's recent history is the only documented case in California of e-bike trail access being halted by a lawsuit, and anyone planning to expand access on public land should read it.
- September 2024 — the Board approved a Watershed Trail Sharing Pilot and a Class 1 E-Bike Trial.
- October 1, 2024 — the California Native Plant Society, Marin Audubon Society and Marin Conservation League sued, alleging CEQA violations.
- October 3, 2024 — a temporary restraining order halted both programs before implementation. Status quo restored.
- 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.
The lesson is procedural rather than substantive. The objection was not that e-bikes are unsafe; it was that the district had not done the environmental review CEQA requires before opening trails to a new use. An agency expanding e-bike access needs that review, and EBRPD's September 2023 amendment was accompanied by a CEQA Notice of Exemption (CEQAnet 2023090343) for exactly this reason.
It also explains why MCOSD's own reconsideration is moving slowly: survey, staff report, Commission decision, with the litigation next door as a live example of what happens if you skip steps.
The three strictest regimes in Northern California
- Midpeninsula Regional Open Space District — e-bikes banned on essentially all of roughly 160 miles; limited Class 1 and 2 at only two preserves; permanent, no sunset; ADA OPDMD the only general exception.
- Marin County Open Space District — flat "electric bicycles are not allowed on District lands" across roughly 180 miles.
- Capitola — complete citywide sidewalk ban on all e-bikes and e-scooters with no age exception, plus a total Village-area bicycle sidewalk ban.
Marin's is arguably the strictest of the three as written, because it admits no class and names no designated exceptions at all.
Where the reconsideration might land
The Commission is considering Class 1 only — not Class 2 or Class 3. That matches the pattern elsewhere: Sonoma County Regional Parks permits Class 1 only; the US Forest Service Lake Tahoe Basin permits Class 1 only on about 112 miles; California State Parks may designate Class 1 for trails already open to bicycles; EBRPD folded Class 1 into its definition of "bicycle" and left Class 2 and 3 outside.
Class 1 — pedal-assist, 20 mph cutoff, no throttle — has become the category land managers are willing to admit. If Marin follows, it would bring the district into line with most of its peers and leave the throttle as the dividing line.
Common questions
Are e-bikes allowed on Marin County Open Space District lands?
No. The District's rule is unqualified: "Electric bicycles are not allowed on District lands" — no class exceptions, across roughly 180 miles of fire roads and trails. Conventional bicycles themselves are limited to fire protection roads, designated bicycle pathways, and public roads not signed against such use.
Is Marin County going to allow Class 1 e-bikes on open space trails?
It is under active consideration but nothing has been adopted. 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. Only Class 1 is being considered — not Class 2 or Class 3.
Can you ride an e-bike on Marin County paved pathways?
Yes, Class 1 and Class 2 — that is a separate regime from the Open Space District. Under a September 24, 2019 Board action, Class 1 and Class 2 are permitted on county- maintained paved multi-use pathways and in Marin County Parks parking lots, with Class 3 prohibited. The limit is 15 mph, dropping to 10 mph on the Bayfront Park segment of the Mill Valley–Sausalito Path.
Can you ride an e-bike on Mt. Tamalpais?
Only a Class 1, and only on watershed fire roads where conventional bikes are already permitted, under Marin Municipal Water District's revised pilot running from July 1, 2025 for up to two years. Two earlier 2024 pilots were rescinded in May 2025 after a CEQA lawsuit and a temporary restraining order halted them before they began.
Sources
- Marin County Parks — Rules and Regulations
- Marin County Visitor — Marin may allow Class 1 e-bikes on selected open space trails
- Marin Water — Watershed trail sharing pilot and e-bike Class 1 trial on hold following legal challenge
- Marin Water — Revised Class 1 e-bike pilot approved
- TAM — Marin E-Bikes Technical Study (PDF)