- Base Medical: https://www.base-medical.com/
- National Weather Service: https://www.weather.gov/sew/
- Northwest Avalanche Center: https://nwac.us/
- Washington Trails Association: https://www.wta.org/
- Metro/Trailhead Direct: https://trailheaddirect.org/
- AdventureSmart: https://www.adventuresmart.ca/ is a Canadian national program providing valuable information and encouraging participants to “Get informed and go outside”. A few features of the site are limited to use within Canada.