 Creekside parks include Johnson Creek Park, about of natural areas and paths; the Crystal Springs Rhododendron Garden, along Crystal Springs Creek; Tideman Johnson Natural Area, about of natural areas and paths; Leach Botanical Garden, about , a public garden dedicated to the study of botany and horticulture with an emphasis on plants of the Pacific Northwest; Beggars Tick Wildlife Refuge, a wetland of ; Powell Butte Nature Park, about on an extinct cinder cone volcano, including natural areas and hiking, biking, and equestrian trails; and Gresham's Main City Park, about including sports fields, picnic areas, and trails.In 2007 Metro bought two parcels of land totaling for preservation adjacent to Johnson Creek on Clatsop Butte, south of Foster Road near Powell Butte and Portland's Pleasant Valley neighborhood.The purchases cost $10.9 million, drawing on bonds approved by a 2006 ballot measure.