Get in the spirit of Earth Day and celebrate with Reid Park Zoo at Saturday's Party for the Planet event.

From 9 a.m. to noon, attendees can enjoy a variety of conservation-themed activities and informational displays, and anyone who rides their bikes will get free admission during the same time period.

To get in for free, just show your bike at the gate. Valet bike parking will be available inside the zoo until 1 p.m.

Party for the Planet, the largest combined Earth Day celebration in the country, is made up of 130 zoos and aquariums across the country.