All FREE in Washington Select search type Accommodation Attractions Information Centres keyword location searchsearch Reset Location searchsearch {"bg":"","mt":"","mr":"","mb":3,"ml":"","pt":"","pr":"","pb":"","pl":"","border":"","rounded":"","rounded_size":"","shadow":""} View: Grid 1 View: Grid 2 View: Grid 3 View: Grid 4 View: Grid 5 View: List Smithsonian National Zoological Park No Reviews Favorite Hours Grounds: 6 a.m.- 8 p.m. (last admittance 7 p.m.) Visitor Center: 9 a.m.- 5 p.m. Exhibit Buildings: 10 a.m.- 6 p.m. Concessions: 9 a.m.- 5 p.m. Shops: 9 a.m.- 5 p.m. Note: Winter hours begin in November. Read more...