From Save Mount Diablo:

Castles & Peregrine Falcons
Tuesday, April 22
9:30am - 11:30am

Walk along beautiful Pine Creek and marvel at the magnificent rock formations and wildflowers. Bring binoculars to look for soaring peregrines. There are four creek crossings where hiking poles are very helpful if wet conditions. Be sure to bring plenty of water and a snack, and dress in layers. Sturdy shoes or hiking boots are recommended. Heavy rain cancels.

Participant Limit: 20 people

For more info and to register, visit: https://savemountdiablo.org/event/castles-peregrine-falcons-2/