Situated in Pleasant Valley at Tower Junction, this trailhead provides access to the following trails:

• Garnet Hill Loop Trail
• Lost Lake Trail

There is a large parking lot is located here, as well as vault toilets. The Lost Lake Trailhead is reached by following the road to the Roosevelt Lodge, then taking the path that leads back behind the main lodge building.

Garnet Hill Loop Trail

This moderate 7.6-mile (12.2-km) loop trail follows a dirt stagecoach road through sagebrush meadows to Yancy's creek. The trail continues north along Elk Creek through meadows and forest until nearly reaching the Yellowstone River. Here the trail divides: the west fork joins the Hellroaring Trail, (if desired, take the trail for an extra 1/2 mile to the suspension bridge over the Yellowstone River). The east fork traverses around Garnet Hill and back to Tower. CAUTION: Grizzly bears frequent this area.

Lost Lake Trail

This moderate 2.8-mile (4.5-km) loop trail begins behind Roosevelt Lodge and traverses through forest to the lake then descends through sagebrush meadows and loops by the Petrified Tree Parking Lot and returns to the Roosevelt Lodge. There is the option of adding 1/2 mile (.8 km) to the loop and going to Lost Creek Falls. CAUTION: Grizzly bears, black bears, and bison frequent this area.

Backcountry Regulations

Permit required for fishing, boating, riding, and overnight camping. More information at the Center Backcountry Office: (307) 344-2160.

Hiking

Hike in groups of 3 or more; keep your group together. Tell someone where you are going and when you expect to return. Know your route, carry a map, and be able to navigate. Do not hike after dark. Stay on established trails; off-trail travel prohibited in thermal areas.

Fishing and Boating

Aquatic Invasive Species (AIS) inspection required for all watercraft including boats, float tubes, and stand up paddle boards. Felt soles prohibited.

Riding and Packing

Proof of negative Coggins test within last 12 months required.

Food Storage and Camping

These regulations apply to ALL backcountry users. Sleep 100 yards (91 m) from your food storage and cooking areas. Do not leave food, trash, toiletries, backpacks, coolers, water bottles, or any potential attractant unattended. Store food in an approved bear resistant container or hang on a food pole 10 feet (3 m) above the ground and 4 feet (1 m) from sides. Carry a minimum of 35 feet (11 m) of rope. Campfires allowed only in designated campsites within established fire rings. Extinguish campfires completely before leaving site.

Follow LEAVE NO TRACE travel and camping techniques. Enjoy the backcountry and help keep it clean for others to enjoy. Bury human waste and toilet tissue in a 6–8 inch (15–18 cm) deep “cat hole” at least 100 feet (30 m) from water and trails.

River Crossings

Park waters are swift and cold. Swimming in park rivers is not recommended. River crossings are hazardous.

Lightning Safety

During thunderstorms, descend to lower elevation, avoid open areas and isolated tall trees. Assume lightning position: feet together, crouch on foam pad or sit on pack, hands over ears.

Regulations

• Leave What You Find: Do not collect anything from the park.
• No Pets: No pets on trail. Obtain service animal regulations at backcountry offices.
• No Hunting: No hunting or discharge of firearms.
• No Motorized Vehicles: No motorized vehicles on trails.
• Wheeled Vehicles Restricted: No bicycles, strollers, or wheeled vehicles (except wheelchairs), except where specified.

In an emergency, dial 9-1-1 or contact the nearest ranger station.

Animals are Dangerous

• Do not approach or feed any animal.
• Bison and elk have injured people.
• Stay 100 yards (91 m) from bears and wolves.
• Stay 25 yards (23 m) from all other animals.

Be Prepared for a Bear Encounter

Grizzly and black bears inhabit all of Yellowstone National Park.

Be Alert: Watch for signs of bear activity: scratches in trees, tracks, scat, or dig sites. Avoid dead animals.

Make Noise: Avoid surprising a bear by calling out and clapping your hands at regular intervals to make your presence known.

Carry Bear Spray: Carry bear spray and know how to use it. Keep it immediately available, not inside your pack.

Hike in Groups: Travel in groups of 3 or more is recommended. Stay with your group at all times.

What to do...

If You Encounter a Bear: Stay calm, do not run. Quietly detour or back away; stop if this seems to agitate the bear. Stay at least 100 yards (91 m) from bears. Do NOT feed bears or other animals.

If a Bear Charges You: Stand still, do not run. Stand your ground and use your bear spray. Spray when the bear is 60 feet (18 m) away or closer. If a bear charges, it may be a bluff charge.

If a Bear Makes Contact: Drop to the ground; play dead. Lie face down and clasp your hands over the back of your neck; stay still and silent. Wait several minutes after the bear leaves before getting up and leaving the area.