Hiking is one of the most beneficial activities I know of. Good exercise ranging from a casual walk to a strenuous workout, Mentally relaxing, inexpensive, Excellent opportunity to spend time with family or friends, Trails located in most areas.
My favorite local is the Pacific North West, especially here at the central Oregon Coast. Weather is nice most of the time. Even during the winter rainy season there are plenty of days with sunshine. Quite often on cloudy days a walk on the beach can be had in dry comfort. Summer weather is cool and nice in the coastal areas even when inland temperatures go into the 90s.