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Clark’s Lookout State Park is a geological formation located in Dillon, Montana, USA.

Visual Characteristics

The park features a prominent, eroded sandstone butte. The rock exhibits layered strata in shades of tan, ochre, and rust. Vegetation consists of sparse sagebrush and grasses at the base, transitioning to more resilient hardy shrubs and small pines on the upper slopes. The summit offers a panoramic view of the surrounding Beaverhead Valley.

Location & Access Logistics

Clark’s Lookout State Park is situated approximately 2 miles (3.2 km) south of Dillon, Montana. Access is via Interstate 15, taking Exit 138 (Dillon/MT-278). Follow MT-278 South for approximately 1.5 miles (2.4 km) to the signed park entrance on the right. A gravel road leads to a small parking area at the base of the butte. No public transport services the park directly.

Historical & Ecological Origin

The butte is composed of sedimentary rock formed during the Tertiary period, approximately 66 to 2.6 million years ago. It represents an ancient alluvial fan deposit. The area was historically used as a vantage point by Native American tribes and later by settlers for observing the valley.

Key Highlights & Activities

Hiking the designated trail to the summit is the primary activity. The trail is approximately 0.75 miles (1.2 km) one-way and is moderately steep. Observation of local flora and fauna, including various bird species and small mammals, is possible. Photography of the valley landscape from the summit is recommended.

Infrastructure & Amenities

A small, unimproved parking area is available. No restrooms, potable water, or shade structures are present within the park. Cell phone signal is intermittent at the base and generally absent at the summit.

Best Time to Visit

For photography, early morning or late afternoon provides optimal lighting conditions due to the angle of the sun on the butte's strata. The best months for visiting are May through October, avoiding winter snow and ice. The trail is accessible year-round, weather permitting.

Facts & Legends

Local lore suggests that the butte was used as a signaling point by early inhabitants, with fires lit on the summit to communicate across the valley. The name "Clark's Lookout" is attributed to Captain William Clark of the Lewis and Clark Expedition, though direct historical documentation of his personal use of this specific site is limited.

Nearby Landmarks

• University of Montana Western (1.5km North)
• Beaverhead County Museum (2.5km North)
• Dillon Reservoir (4.0km Southwest)
• Big Hole River (Access points within 3km East)