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Castle Mountains

Wednesday, November 24, 2021

Other Names

White Sulpher Springs, White Sulphur Springs, Grasshopper, Lewis And Clark National Forest, White Sulpher Springs Ranger District, Four Mile Creek, Horse Park, Beartrap Peak, Willow Creek, Woodchuck Mountain, Elk Peak, Castle Lake, Richardson Creek Trail

Last Known StatusOpen

This remote area has about 50 miles of mostly single track trails that wind through the Castle Mountains. Most of the trails form interconnecting loops, with some trails open to ATVs 50 inches or less.

Two primitive campgrounds are available that offer direct trail access. Grasshopper Campground has 12 sites and potable water but charges a small fee. Richardson Campground is free but only has three campsites but has no water. Both campgrounds have a vault toilet.

Trail Map... Nearby ATV Trails...


Permit RequiredYesMontana OHV Permit
Dates OpenTrails have variable seasonal restrictions - see MVUM map for details.
Other ATV Stickers AcceptedNoA non-resident temporary registration sticker is required. (As of March 2020, Montana no longer honors stickers from any 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)has entrance gate or posts
Allow Dirt Bikes, Trail Bikes and Motorcycles Motorcycles & Dirt BikesPermitted
Allow All Terrain Vehicles / Quads / Four Wheelers ATVsSome Areas(maximum width 50 inches)
permitted on Trails 618, 716, 717, 719, 725
Allow Utility Terrain Vehicles, Side by Sides (SXS), RZR UTV & SXSSome Areas(maximum width 50 inches)
permitted on Trails 618, 716, 717, 719, 725
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 CampingSome Areas(camp in developed sites only)
Campfire Restrictions CampfiresSome Areas(permitted in developed campsites only)
Night RidingUnknown
Trail BlazingProhibitedkeep vehicle on trail
Rule Enforcement


AreaMotorized Trails
LandNational Forest


Tent: $10.00
RV: $10.00
Addtl. Vehicle: $0.00
Grasshopper Campground Fee


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


Nearest CityWhite Sulpher Springs, MT
AddressFour Mile Creek Road, White Sulphur Springs, MT 59645
Go Back To Montana List
Trail MapGo To Trail Map
From: Livingston, MT
1) Take I-90 east to exit 340
2) Turn left (north) onto US-89 north, continue 65 miles
3) Turn right (east) onto Main Street/US-12, continue about 7 miles
4) Turn right (south-east) onto Fourmile Creek Road, continue about 4 miles
5) At fork turn right for Grasshopper Campground or turn left for Richardson Campground.


Contact InfoLewis And Clark National Forest - White Sulphur Springs District
204 W. Folsom
White Sulphur Springs, MT 59645
(406) 547-3361



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Approx Size64,000 acres (100 sq mi)
Miles Of Trail50
Climate TypeForest
Elevation5750 to 8589 ft.
Trail MaintenanceMarked, Not Rated, Lightly Maintained
Single TrackThis national forest has many single track trails.Many
HazardsThis trail has few hazards.Few(hazards assumed marked but use caution)
Easy Terrain NoviceThis trail has little beginner terrain.Little
Moderate Terrain AmateurThis trail has mostly intermediate level terrain.Mostly
Difficult Terrain ExpertThis trail has some expert terrain.Some


Gasoline Gasoline5-20 Miles (W)Town Pump (406) 547-3310
Diesel Diesel5-20 Miles (W)Town Pump (406) 547-3310
Potable Water WaterOn SiteGrasshopper Campground (406) 547-3361
RV Hookups RV Hookup5-20 Miles (W)Conestoga Campground (406) 547-3890
RV Dump Station RV Disposal5-20 Miles (W)Conestoga Campground (406) 547-3890
Primitive Camping CampgroundOn Site
Convenience Store Conv Store5-20 Miles (W)Town Pump (406) 547-3310
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