A pleasant oasis in an otherwise unremarkable city, the Greenway is best accessed via Sarg Hubbard Park at I-82 exit 33. It's a 10-mile path for walkers and cyclists that tracks the fast-flowing Yakima River through a string of parks and recreation areas. One good stop-off point is the Yakima Area Arboretum , just east of exit 34, where a collection of more than 2000 species of trees and shrubs spreads out over 46 acres of landscaped gardens. You can procure a free walking-tour brochure at the Jewett Interpretive Center .