Big Arm

Geography

Big Arm is located in northwestern Lake County. The census-designated place contains the settlement of Big Arm along the southern shore of Flathead Lake's Big Arm, as well as undeveloped grassland to the south, up to the base of an unnamed mountain. The CDP is bordered to the northeast by the community of Lindisfarne. U.S. Route 93 passes through Big Arm, running just south of the lake shore. The highway leads southeast to Polson, the Lake county seat, and northwest to Elmo. The city of Kalispell is north of Big Arm. According to the United States Census Bureau, the CDP has a total area of , all land. This climatic region is typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters. According to the Köppen Climate Classification system, Big Arm has a humid continental climate, abbreviated "Dfb" on climate maps.

Most-observed species

• Black-billed Magpie

  Pica hudsonia (Sabine, 1823) · Aves
  1,333
• American Robin

  Turdus migratorius Linnaeus, 1766 · Aves
  1,286
• Black-capped Chickadee

  Poecile atricapillus (Linnaeus, 1766) · Aves
  1,246
• Northern Flicker

  Colaptes auratus (Linnaeus, 1758) · Aves
  1,227
• Canada Goose (canadensis Group)

  Branta canadensis (Linnaeus, 1758) · Aves
  1,222
• Common Raven

  Corvus corax Linnaeus, 1758 · Aves
  1,093
• Ring-billed Gull

  Larus delawarensis Ord, 1815 · Aves
  976
• Mallard

  Anas platyrhynchos Linnaeus, 1758 · Aves
  925

Most recent

• M 3.2 — 2026-08-28
  3 km NE of Seeley Lake, Montana
• M 2.6 — 2026-01-19
  13 km ESE of Kicking Horse, Montana
• M 3.1 — 2025-12-01
  27 km NE of Seeley Lake, Montana
• M 2.7 — 2024-11-08
  6 km SSE of Seeley Lake, Montana
• M 3.5 — 2024-09-01
  32 km NE of Seeley Lake, Montana
• M 3.8 — 2024-07-05
  24 km ENE of Seeley Lake, Montana