$2 (per hour in a lot off N.W. 54th St.).
Grounds open daily 7 a.m.-9 p.m. Visitor center daily 10-6, May-Sept.; Thurs.-Mon. 10-4, rest of year. Fish ladder viewing room daily 7 a.m.-8:45 p.m. One-hour guided tours of the locks, grounds and fish ladder depart the visitor center daily at 1 and 3 (also Sat.-Sun. at 11), May-Sept.; Thurs.-Mon. at 2, Mar.-Apr. and Oct.-Nov. Allow 45 minutes minimum.