Hidden Valley Nature Center | Sat, Jun 26 - Sat, Aug 28 | All AgesJoin us on Saturdays for bike riding at Hidden Valley Nature Center! Experience the vast network of trails on two wheels! All skill levels are encouraged to go for a spin. Rental rates: Adult: $25/2hrs., $35/4hrs. Junior: $15/2hrs., $20/4hrs. 50% discount for members!