Region atlas · West
West ATV / UTV / OHV Laws — 13-State Atlas
The federal-lands region — BLM, US Forest Service, and National Park acreage dwarfs state ownership. Nonresident OHV decals on state-managed trails are the most common rider trip-up.
Last reviewed
West at-a-glance
Aggregate rule patterns across the 13 West states this atlas covers. Counts exclude states where the relevant rule has not yet been verified against state code.
- Helmet pattern
- Under 18 only · 9
- 3 all-rider · 9 under-18 · 1 situational
- Min age unsupervised
- Age 16–18
- Median 16 across 8 codified states · 5 pending verification.
- Registration required
- 12 of 13
- 92% of verified states require OHV registration to ride on public land.
- Federal public lands
- 12 of 13
- 12 states have a BLM / USFS / federal-trails entry point mapped — overlay trip planning against agency rules.
West states (13)
Each row links to the full state reference. Helmet / min-age columns summarize the headline rule; the per-state page carries the full citation chain.
| State | Registration | Helmet | Min age |
|---|---|---|---|
| AKAlaska | Required | Under 18 | — |
| AZArizona | Required | Under 18 | — |
| CACalifornia | Required | All riders | 18 |
| COColorado | Required | Under 18 | 16 |
| HIHawaii | Not required | All riders | — |
| IDIdaho | Required | Under 18 | 16 |
| MTMontana | Required | Under 18 | 16 |
| NVNevada | Required | Situational | — |
| NMNew Mexico | Required | Under 18 | 18 |
| OROregon | Required | Under 18 | — |
| UTUtah | Required | Under 18 | 16 |
| WAWashington | Required | All riders | 16 |
| WYWyoming | Required | Under 18 | 16 |
Intra-region side-by-side comparisons (29)
Every pair of bordering West states that this atlas has built a comparison page for — useful when your ride crosses a single state line within the region.
- AK ↔ WAAlaska vs Washington
- AK ↔ ORAlaska vs Oregon
- AK ↔ IDAlaska vs Idaho
- AK ↔ MTAlaska vs Montana
- AZ ↔ NMArizona vs New Mexico
- AZ ↔ UTArizona vs Utah
- AZ ↔ NVArizona vs Nevada
- AZ ↔ CAArizona vs California
- CA ↔ ORCalifornia vs Oregon
- CA ↔ NVCalifornia vs Nevada
- CA ↔ WACalifornia vs Washington
- CO ↔ WYColorado vs Wyoming
- CO ↔ NMColorado vs New Mexico
- CO ↔ UTColorado vs Utah
- CA ↔ HICalifornia vs Hawaii
- HI ↔ ORHawaii vs Oregon
- HI ↔ WAHawaii vs Washington
- AK ↔ HIAlaska vs Hawaii
- ID ↔ MTIdaho vs Montana
- ID ↔ UTIdaho vs Utah
- ID ↔ NVIdaho vs Nevada
- ID ↔ ORIdaho vs Oregon
- MT ↔ WYMontana vs Wyoming
- NV ↔ UTNevada vs Utah
- OR ↔ WAOregon vs Washington
- NV ↔ ORNevada vs Oregon
- UT ↔ WYUtah vs Wyoming
- ID ↔ WAIdaho vs Washington
- MT ↔ WAMontana vs Washington
Topic guides
Reference explainers and typologies that sit alongside the per-axis state atlases — vehicle category, where you can ride, by rider, and what to check before a trip.
Vehicle category & paperwork
ATV / UTV / OHV glossary
Terminology dictionary — every abbreviation a state DNR page or OHV statute uses (ATV / UTV / SxS / ROV / LSV / NEV / OHV / ORV / OHRV / MPOHV / WATV / Class I-III / green-sticker / T-recoded VIN and more).
State DNR / OHV agency directory
50-state lookup for the agency that handles ATV / UTV / OHV permitting — name, phone, OHV program URL, sticker / reciprocity links. Call the state, not Google.
UTV vs ATV vs side-by-side
How states classify the OHV family — and when the category swaps a helmet, age, or registration rule.
Street-legal conversion by state
Four state pathways for putting an OHV on the road — DMV-plate full conversion, DNR on-road permit, local-option designation, or no pathway. Per-state matrix.
Title requirements by state
Which states title an OHV, which only register, and which transfer on bill of sale — with issuing-agency, machine-class, and vintage-cutoff notes.
Street-legal conversion (typology)
When and where an OHV becomes legal on public roads — federal LSV vs state OHV-on-road permit.
Title from a bill of sale
Four legal paths from a bill-of-sale-only purchase to a state-recognised title certificate.
Lost title recovery
Five recovery paths sorted by who the titleholder is, whether a lien is on it, and what's missing.
Where you can ride
ATV on the road shoulder
Crossing-vs-traveling, agricultural exemptions, and the federal Interstate carveout.
Federal & tribal lands
BLM, USFS, NPS, USACE, and tribal nations — five jurisdictions and what rule each carries.
ATV / OHV trail directory by state
State DNR, USFS, BLM, private, and tribal public-access trail systems across all 50 states — with operator authority and trail-system source.
50-state OHV trail-pass matrix
Per-state season structure (year-round / spring → fall / winter-shared / closure-default), nonresident requirement, and DNR pass page for every state.
Seasonal trail-pass calendar (explainer)
Four DNR season structures and how to spot which one your state runs before buying the pass.
By rider
Kids on ATVs by state
Parental-decision atlas — minimum age, supervision rules, engine-class tiers, safety-course requirement, and private-land carveouts.
ATV safety course by state
Who needs to take a course — under-age statutory mandates, ASI ATV RiderCourse / E-Course nationwide, and state-DNR-run alternatives that don't accept ASI.
Helmet certifications — DOT vs Snell vs ECE
Three standards cover every US-market helmet. What each one tests, which combination clears a state-law inspection, and the five novelty-helmet warnings every buyer should read.
Trip planning
Multi-state trip planner (tool)
Pick the states on your route — get a per-stop compliance card for registration, helmet, age, nonresident permit, and reciprocity. Free, no signup.
Compare two states side-by-side
121 adjacent-state pair pages — registration, helmet, age, and reciprocity lined up row-by-row for trailering across the line.
Cross-state trailering checklist
Five paperwork buckets and five compliance gotchas before you trailer across a state line.
State-to-state reciprocity
Four state approaches to out-of-state OHV recognition — and what each means for nonresidents.
ATV insurance requirements
Four state approaches plus four insurance products — and where each one leaves a coverage gap.
ATV insurance cost by state
Six drivers that move the premium and four state regimes that set the floor — plus where to actually get a real quote.
DUI on an ATV
How state codes treat off-highway impaired operation — four jurisdictional patterns.
Winter storage & spring re-commissioning
Nine-step winterization checklist and five-step spring wake-up — for the eight northern states where the trail season closes for winter.