Washington, located in the Pacific Northwest, experiences a diverse climate due to its varying topography. The western region enjoys a mild, wet climate, influenced by the Pacific Ocean, with cool summers and abundant rainfall. The eastern part has a drier, continental climate, with hot summers and cold winters. The state's hydrology is characterized by numerous rivers, including the Columbia and Snake Rivers, providing ample water resources for agriculture and hydroelectric power generation. Washington is also home to the Cascade Range, featuring majestic peaks and glaciers, and the Olympic Mountains, offering unique ecosystems.

California, known for its diverse geography, has a Mediterranean climate. The state experiences mild, wet winters and hot, dry summers, with variations based on elevation and proximity to the coast. California's hydrology is defined by the Sierra Nevada Mountains and the Central Valley. The Sierra Nevada Mountains provide a significant source of freshwater, while the Central Valley is an agricultural hub. California boasts numerous outdoor recreation opportunities, including hiking and camping in national parks like Yosemite and Joshua Tree, surfing along the coast, skiing in the Sierra Nevada, and exploring the Mojave Desert.

Overall, both Washington and California offer a wide range of outdoor activities, thanks to their unique climates and abundant natural resources.