Oregon Zoo tickets will be half off the regular price after 2 p.m. on weekdays from now until Sept. 30. This deal is not available on Second Tuesdays and can’t be combined with other discounts, such as the discount for using Tri-Met. Arriving at the zoo after 2 p.m. still allows visitors four hours to see all the exhibits before the zoo closes at 6 p.m. And on Aug. 6 and Aug. 20, both Wednesdays, the zoo stays open until 8 p.m. for the special Sunset at the Zoo events, featuring live music and family activities.