What would summer be without the screams of happy thrill seekers risking life and limb on a roller coaster? Covering more than 44 acres, this amusement park first opened in 1905 to coincide with the Lewis and Clark Exposition. Beneath the shady oaks for which the park is named, you'll find waterfront picnic sites, miniature golf, music, and plenty of thrilling rides. Here in the park, you'll also find one of the largest roller-skating rinks in the West, and an organist still plays a Wurlitzer pipe organ for the skaters.