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Third Fork Heart Attack Loop

Monday, July 11, 2016

Alt Names

Heart Attack Loop, Wahlstrom Hollow Trail #238, Third Fork Rock Creek, Magpie Basin, Sawtooth National Forest, Dry Flat Spring, Cow Spring, Elk Butte, Cotton Spring, Bear Gulch, Pike Mountain, Telephone Canyon, Harrington Peak, Martindale Fork, Rock Creek Trail System, Diamondfield Jack Campground, Porcupine Springs Campground, Pettit Campground, South Hills, Sawtooth National Forest, Minidoka Ranger District

Last Known StatusOpen

Third Fork Heart Attack Loop consists of over 13 mile of secluded single track trail that winds through a beautiful aspen grove forest. The single track trail ties into ATV trails in the south and numerous miles of forest service roads. There is no cost to ride this trail. Camping with direct trail access can be found futher south on Rock Creek Road. This trail is also very popular with mountain bike bikers and equestrian riders.

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Nearest CityHansen, ID
Go Back To Idaho List
Street Map
Trail MapGo To Trail Map
From: Twin Falls, ID
1) Take Hwy 30 east toward Hansen
2) Turn right (south) on Rock Creek Road
3) Continue about 21 miles
4) Trailhead will be on your left.


LandNational Forest


Prosplenty of single track, numerous campgrounds to choose from, free
Our RatingRatingVery Good    
Recommended Stay1-2 Days
Comments(Scroll Down For Visitor Reviews & Comments)


Permit RequiredYesIdaho OHV Registration Sticker
Dates OpenYear-Round
Spark ArrestorYesA spark arresting 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 MotorcyclesPermitted
Allow All Terrain Vehicles / Quads / Four Wheelers ATVsProhibited
Allow Utility Terrain Vehicles, Side by Sides (SXS), RZR UTVs / SXSProhibited
Allow 4x4 Jeeps, SUVs and 4 x 4 Trucks with License Plates 4x4s / Jeeps (registered)Prohibited
Dune Buggy/Sand Rail
4x4 (unregistered)
Two Strokes /
2 Cycle Engines
No Restriction
Helmets RequiredYouth Onlyrequired for persons under 18 by state law
(RiderPlanet strongly recommends helmets for all riders.)
BicyclesNo Restriction
HikingNo Restriction
HorsebackNo Restriction
Camping / Overnight RV Parking CampingSome Areas(camp in developed sites only)
Campfire Restrictions CampfiresSome Areas(permitted in developed campsites only)
Night RidingUnknown
Cross CountryProhibitedkeep on designated trails
AlcoholNo Restriction
FirearmsSome Areas
Emergency / Law EnforcementFew/Periodic
Insurance*Disclaimer: Be Safe! RiderPlanet recommends insurance for all riders and visitors to the destinations depicted on this website.


ParkingNo ($0.00)
EntryNo ($0.00)
RidingNo ($0.00)
CampingNo ($0.00)


Contact InfoSawtooth National Forest - Minidoka Ranger District
3650 South Overland Avenue
Burley, ID 83318-3242
(208) 678-0430
Contact InfoIdaho Parks And Recreation
5657 E Warm Springs Ave
Boise, ID 83716
(208) 334-4197
CommentIdaho OHV Sticker Info



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Square Miles20
Miles Of Trail30
Climate TypeForest
Elevation5200 to 7400 ft.
Trail MaintenanceMarked, Not Rated, Not Maintained
Loose DirtThis trail has some loose dirt.Some
Hard PackThe trail has some hard pack terrain.Some
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 some trees.Some
Steep HillsThis trail has few steep hills.Few
Water CrossingsThe trail has few water crossings.Few
BermsThe trail has few berms.Few
Sand/Gravel PitsThis national forest has no sand or gravel pits.None
Single TrackThis national forest has almost all single track trails.All
RoadsThis national forest has few roads.Few
IntersectionsThis trail has some intersections.Some
Rider TrafficThe national forest has some rider traffic on typical days.Some
ShadeThis national forest has some shaded areas.Some
Ranges/GunfireThis national forest has few shooting ranges or gunfire.Few
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


First Aid First Aid20-30 Miles (NW)Magic Valley Regional Medical Center (208) 737-2000
Gasoline Gasoline20-30 Miles (N)Hansen
Diesel Diesel20-30 Miles (N)Hansen
Potable Water Water1-5 Miles (N)Steer Basin Campground
RV Hookups RV Hookup5-20 Miles (NW)Nat-Soo-Pah Hot Springs (208) 655-4337
RV Dump Station RV Disposal5-20 Miles (NW)Nat-Soo-Pah Hot Springs (208) 655-4337
Primitive Camping Campground1-5 Miles (N)Steer Basin Campground
Convenience Store Conv Store20-30 Miles (N)Hansen Market (208) 423-5547
Swimming Swim Area20-30 Miles (NE)Murtaugh Lake
Body of Water Water BodyOn Site Third Fork Rock Creek
Boating Launch Boat Ramp20-30 Miles (NE)Murtaugh Lake
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