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Wilson Flats ATV Trail System

Thursday, May 30, 2024

Other Names

Wilson Flat Trail System, Fairfield Area ATV Trails, Anderson Ranch Reservoir, Granite Mountain, Boise National Forest, Mountain Home District, South Fork Boise River, Mountain Home ATV Trails, Wilson Flat Trails

Last Known StatusClosed For Season

Right across from the Anderson Ranch Reservoir is 15 miles of moderately challenging ATV trails that form a nice scenic loop. The area offers panoramic views of the surrounding mountains, the dam and the South Fork Boise River. The trails wind through rolling hills and narrow ridgelines. This trail system is open to dirt bikes and ATVs less than 50 inches.

Trail Map... Nearby ATV Trails...


Permit RequiredYesIdaho OHV Registration Sticker
Dates OpenJune 16 through September 30
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 WidthYes (50 inches)
Allow Dirt Bikes, Trail Bikes and Motorcycles Motorcycles & Dirt BikesPermitted
Allow All Terrain Vehicles / Quads / Four Wheelers ATVsPermitted(maximum width 50 inches)
Allow Utility Terrain Vehicles, Side by Sides (SXS), RZR UTV & SXSPermitted(maximum width 50 inches)
Allow 4x4 Jeeps, SUVs and 4 x 4 Trucks with License Plates 4x4 & Jeeps (registered)Prohibited
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 Camping
Campfire Restrictions Campfires
Night RidingUnknown
Trail BlazingProhibitedno trailblazing
Rule Enforcement


AreaMotorized Trails
LandNational Forest




Our RatingRatingGood
Recommended StayFull Day
Comments(Scroll Down For Rider Reviews & Comments)


Nearest CityMountain Home, ID
AddressAnderson Dam Road, Atlanta, ID 83601
Go Back To Idaho List
Trail MapGo To Trail Map
From: Boise, ID
1) Take I-84 South to Exit 95
2) Turn left (north) off the exit ramp onto SR-20, continue 20 miles
3) Turn left (north-west) on Anderson Dam Road, continue about 7 miles
4) Staging area is on the left (west).


Contact InfoBoise National Forest - Mountain Home District
2180 American Legion Blvd.
Mountain Home, ID 83647
(208) 587-7961
Contact InfoIdaho Parks And Recreation
5657 E. Warm Springs Ave
Boise, ID 83716
(208) 334-4197
CommentIdaho OHV Sticker Info



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Approx Size54,200 acres (85 sq mi)
Miles Of Trail15
Climate TypeForest
Elevation4200 to 5200 ft.
Trail MaintenanceMarked, Not Rated, Lightly Maintained
Loose DirtThis trail has little loose dirt.Little
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 little dust on typical days.Little
RocksThis trail has little rocks.Little
TreesThe trail has many trees.Many
Steep HillsThis trail has some steep hills.Some
Water CrossingsThe trail has no water crossings.None
Small JumpsThis trail has no small jumps.None
Large JumpsThis trail has no large jumps.None
BermsThe trail has few berms.Few
Sand/Gravel PitsThis national forest has no sand or gravel pits.None
Single TrackThis national forest has no single track trails.None
RoadsThis national forest has no roads.None
ShadeThis national forest has some shaded areas.Some
HazardsThis trail has few hazards.Few(hazards assumed marked but use caution)
Easy Terrain NoviceThis trail has mostly beginner terrain.Mostly
Moderate Terrain AmateurThis trail has some intermediate level terrain.Some
Difficult Terrain ExpertThis trail has little expert terrain.Little


Gasoline Gasoline5-20 Miles (NE)Nitz Pine Store (208) 653-2222
Diesel Diesel5-20 Miles (NE)Nitz Pine Store (208) 653-2222
Potable Water Water5-20 Miles (E)Fort Running Bear RV and Camping Resort (208) 653-2494
RV Hookups RV Hookup1-5 Miles (E)Fort Running Bear RV and Camping Resort (208) 653-2494
RV Dump Station RV Disposal1-5 Miles (E)Fort Running Bear RV and Camping Resort (208) 653-2494
Primitive Camping Campground1-5 Miles (SE)Spillway Campground (208) 587-7961
Convenience Store Conv Store5-20 Miles (NE)Nitz Pine Store (208) 653-2222
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