Hundreds of Casper area residents will gather at Mike Lansing Field for the 13th annual Platte River Revival Volunteer Day on Saturday, according to a news release from Casper's Parks and Recreation Department.

This event is hailed as the largest national Public Lands Day, and it also is a Wyoming Public Lands Day event.

Federal, state and local agencies will participate as well as clubs, organizations and individuals. Activities include tree wrapping, in-water trash cleanup, and land litter pickup.

This is the schedule:

8:15 a.m. -- Registration at Mike Lansing Field at the North Poplar Street parking lot.

9 a.m. -- Volunteers will deploy to their assignments.

10 a.m. -- Press conference at Mike Lansing Field with follow-up interviews at areas of interest.

Noon -- Barbecue lunch served by service industry representatives.

More than 300 volunteers have already registered. Anyone else wishing to participate should arrive at Mike Lansing Field between 8:15 a.m. and 9 a.m. to register. Registrations are not accepted after 9:15 a.m.