Principali vie d'acqua nella regione occidentale (Nord America)

Fiumi principali

• Colorado River
• Columbia River
• Fraser River
• Missouri River
• North Saskatchewan River
• Rio Grande
• Sacramento River
• San Joaquin River
• Snake River
• Yukon River

Laghi principali

• Great Bear Lake
• Great Slave Lake
• Lake Athabasca
• Lake Tahoe
• Lake Winnipeg