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Yankee Fork State Park

Monday, November 29, 2021

Other Names

Bayhorse ATV Trails, Challis Salmon National Forest, Mt. Greylock, Lombard ATV Trail

Last Known StatusOpen

This area offers miles of marked trails that sprawl over BLM and National Forest land. The Lombard Trail starts from the Yankee Fork Visitor Center and heads west about 13 miles toward the ghost town of Bayhorse, which is a center point for more trails.

Vegetation consists of scrub and sage brush at lower elevations and mixed pine trees at higher elevations. The parking area next to the Yankee Fork State Park is open year round however the Bayhorse parking area is closed during the winter months.

Trail Map... Nearby ATV Trails...


Permit RequiredYesIdaho OHV Registration Sticker
Dates OpenYear-Round
Other ATV Stickers AcceptedNoA non-resident registration sticker must be purchased. (As of January 2020, Idaho no longer honors stickers from other states.)
Spark ArrestorYesA spark arresting exhaust silencer or end cap is required for all vehicles.
Noise LimitYes (96 dB)
Whip FlagsNot Required
Maximum Vehicle Width
Allow Dirt Bikes, Trail Bikes and Motorcycles Motorcycles & Dirt BikesPermitted
Allow All Terrain Vehicles / Quads / Four Wheelers ATVsPermitted
Allow Utility Terrain Vehicles, Side by Sides (SXS), RZR UTV & SXSSome Areas
Allow 4x4 Jeeps, SUVs and 4 x 4 Trucks with License Plates 4x4 & Jeeps (registered)Some AreasNot Recommended
Dune Buggy & Sand Rail
4x4 (unregistered)
2 Stroke EnginesNo Restriction
MX Helmet RequiredYouth Onlyrequired for persons under 18 by state law
(RiderPlanet strongly recommends helmets for all riders.)
Camping / Overnight RV Parking CampingSome Areas(camp in developed sites only)
Campfire Restrictions CampfiresSome Areas(permitted in developed campsites only)
Night RidingUnknown
Trail BlazingProhibitedstay on trails
Rule Enforcement


AreaMotorized Trails
LandBLM, National Forest, State Forest




Our RatingRatingVery Good
Recommended Stay1-2 Days
Comments(Scroll Down For Rider Reviews & Comments)


Nearest CityChallis, ID
Go Back To Idaho List
Trail MapGo To Trail Map
From: Challis, ID
1) Take Hwy 93 south about 1 mile
2) Turn right (west) on SR-75, then immediatley turn right (north) into the Visitor Center.

For Bayhorse Staging Area:
3) Continue west on SR-75 past the visitor center about 8 miles
4) Look for bridge crossing on the right, cross over the Salmon River
5) Turn right (east) on Centenial Flat Road, continue about 100 yards
6) Turn left (north-west) on Bayhorse Creek Road, continue about 3 miles
7) Staging area is on the right.


Contact InfoYankee Fork State Park
24424 Hwy 75
Challis, ID 83226
(208) 879-5244
Contact InfoBLM - Challis Field Office
1151 Blue Mountain Road
Challis, ID 83226
(208) 879-6200
Contact InfoSalmon-challis National Forest - Yankee Fork Ranger District
HC 63, Box 1669, Hwy 93
Challis, ID 83226
(208) 879-4100


Yankee Fork Trail Photo

Yankee Fork State Park Trail

Photo Submitted 8/16/2019 (Thanks!)

Yankee Fork Trail Photo

Yankee Fork State Park Trail

Photo Submitted 8/16/2019 (Thanks!)

Yankee Fork Trail Photo

Yankee Fork State Park Trail

Photo Submitted 8/16/2019 (Thanks!)


Submit a Photo!


Miles Of Trail75
Climate TypeForest
Elevation5000 to 8000 ft.
Trail MaintenanceMarked, Not Rated, Lightly Maintained
Loose DirtThis trail has some loose dirt.Some
Hard PackThe trail has mostly hard pack terrain.Mostly
SandThis trail has no sandy areas.None
MudThe trail has little mud after it rains.Little
DustThe trail has some dust on typical days.Some
RocksThis trail has little rocks.Little
TreesThe trail has many trees.Many
Steep HillsThis trail has some steep hills.Some
Single TrackThis national forest has some single track trails.Some
IntersectionsThis trail has some intersections.Some
Rider TrafficThe national forest has some rider traffic on typical days.Some
HazardsThis trail has few hazards.Few(hazards assumed marked but use caution)
Easy Terrain NoviceThis trail has some beginner terrain.Some
Moderate Terrain AmateurThis trail has mostly intermediate level terrain.Mostly
Difficult Terrain ExpertThis trail has little expert terrain.Little


Gasoline GasolineChallis, ID
Diesel DieselChallis, ID
Potable Water Water1-5 Miles (N)Challis Valley RV Resort (208) 879-2393
RV Hookups RV Hookup1-5 Miles (N)Challis Valley RV Resort (208) 879-2393
RV Dump Station RV Disposal1-5 Miles (N)Challis Valley RV Resort (208) 879-2393
Primitive Camping Campground5-20 Miles (SW)Bayhorse Recreation Site (208) 879-6200
Convenience Store Conv Store1-5 Miles (N)Valley Junction (208) 879-2448
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