Lewis and Clark National Historical Park

Winter weather is the dominant threat near Lewis and Clark National Historical Park, with Oregon's Clatsop County logging 76 heavy snow events, 73 winter storms, and 64 high-wind incidents in recent years — contributing to 31 recorded hazard deaths statewide. These coastal conditions can shift quickly, turning a clear morning into a whiteout or a wind-lashed downpour before afternoon.

Before heading out, check the National Weather Service forecast specifically for Clatsop County rather than a general Oregon outlook, as coastal microclimates behave differently than inland areas. Pack tire chains even in early or late winter, and keep a windproof, waterproof outer layer accessible in your vehicle — not buried in a bag. If winds pick up on exposed headland trails near the fort site, turn back early; the terrain offers little shelter once a storm moves in from the Pacific.