Riverwalk Naturalist Tours. 8 a.m., Native Plants Garden on the Geothermal Greenhouse Partnership site in Centennial Park. Join naturalist guides on a tour of discovery through the Riverwalk wetlands conservation area. Tours are free and last approximately 1-1.5 hours. The 1.5-mile paved trail is wheelchair accessible. Please bring water, sunglasses, a hat and your curiosity. Cameras and binoculars optional. Pets should be left at home. No reservations are needed. This program is sponsored by the Weminuche Audubon Society, Pagosa Wetland Partners and The Springs Resort. For more information, email email@example.com.