Blodgett Canyon is located in southwestern

Montana Montana ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States. It is bordered by Idaho to the west, North Dakota to the east, South Dakota to the southeast, Wyoming to the south, an ...

in the northwestern

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

. It is one of more than two dozen scenic

canyon A canyon (; archaic British English spelling: ''cañon''), gorge or chasm, is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales. Rivers have a natural tendency t ...

s deeply carved into the eastern flanks of the

Bitterroot Range The Bitterroot Range is a mountain range and a subrange of the Rocky Mountains that runs along the border of Montana and Idaho in the northwestern United States. The range spans an area of and is named after the bitterroot (''Lewisia rediviva ...

Bitterroot National Forest Bitterroot National Forest comprises 1.587 million acres (6,423 km2) in west-central Montana and eastern Idaho of the United States. It is located primarily in Ravalli County, Montana (70.26% of the forest), but also has acreage in Idaho ...

. Starting from a group of peaks at over along the Idaho/Montana border, the canyon steeply drops to Blodgett Lake at . After running northeast for about a mile, it turns due east and descends for a total of about to the

Bitterroot Valley The Bitterroot Valley is located in southwestern Montana, along the Bitterroot River between the Bitterroot Range and Sapphire Mountains, in the Northwestern United States. Geography The valley extends approximately from Lost Trail Pass in I ...

. A trailhead is located at the mouth of the canyon, just west of the community of

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and at an elevation of 4,000 feet (m). BlodgettCanyonoverlookview

The vertical canyon walls in the lower section rise over above Blodgett Creek. Printz Ridge and Mill Point make up the northern wall, while Canyon Peak and Romney Ridge contribute to the southern wall. The upper (western) section of the canyon is part of the Selway-Bitterroot Wilderness Area. In the year 2000, the forest in the lower section of Blodgett Canyon was extensively burned. This damage extends about above the trailhead.

Geology

The canyons in this region were carved out by

ice age An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages, and g ...

glacier A glacier (; or ) is a persistent body of dense ice, a form of rock, that is constantly moving downhill under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires ...

s, which left behind

U-shaped valley U-shaped valleys, also called trough valleys or glacial troughs, are formed by the process of Glacial period, glaciation. They are characteristic of mountain glaciation in particular. They have a characteristic U shape in cross-section, with s ...

moraine A moraine is any accumulation of unconsolidated debris (regolith and Rock (geology), rock), sometimes referred to as glacial till, that occurs in both currently and formerly glaciated regions, and that has been previously carried along by a gla ...

hanging valley A valley is an elongated low area often running between hills or mountains and typically containing a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a ve ...

s, and steeply carved granite mountains, cliffs, and

cirques A (; from the Latin word ) is an amphitheatre-like valley formed by glacial erosion. Alternative names for this landform are corrie (from , meaning a pot or cauldron) and ; ). A cirque may also be a similarly shaped landform arising from fluvi ...

, all of which are visible within Blodgett Canyon. The glacial valley is carved into

granitic A granitoid is a broad term referring to a diverse group of coarse-grained igneous rocks that are widely distributed across the globe, covering a significant portion of the Earth's exposed surface and constituting a large part of the continental ...

rocks of the Bitterroot Lobe of the

Idaho Batholith The Idaho Batholith is a granitic and granodioritic batholith of Cretaceous- Paleogene age that covers approximately of central Idaho and adjacent Montana. The batholith has two lobes that are separate from each other geographically and ge ...

, a

Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the more recent of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''cre ...

Paleocene The Paleocene ( ), or Palaeocene, is a geological epoch (geology), epoch that lasted from about 66 to 56 mya (unit), million years ago (mya). It is the first epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), ...

intrusive body emplaced by

subduction Subduction is a geological process in which the oceanic lithosphere and some continental lithosphere is recycled into the Earth's mantle at the convergent boundaries between tectonic plates. Where one tectonic plate converges with a second p ...

beneath the western margin of North America.

Recreation

Blodgett Canyon is known among the climbing community as one of the best big wall climbing spots in Montana and the region. The tallest route is the South Face of Flathead Buttress, at about 1,200 feet of sustained vertical.Green, Randall; ed. 1995. Rock Climbing Montana. Falcon Press: Helena, MT, 1995.

References

{{Montana Canyons and gorges of Montana Landforms of Ravalli County, Montana Bitterroot Range Bitterroot National Forest