Hired a tour guide at the Lykken Center - a good decision since he was an authored biologist who explained the life of the native Indians who had lived in the valley and depended upon their knowledge of plants and trees for their food supply. Such a relief from the heat of PS to walk up the canyon, admire the views of the desert below and the cliffs around us. Comic relief:- we heard an ambulance siren from the city below and all the coyotes on the hillside joined in a chorus! Wear sturdy shoes (runners are o.k. though; take 2 bottles of water and some energy bars). The walk is a moderate uphill push, no hiking experience required. Movement impaired walkers will find it difficult and wheelchairs are definitely not possible. Use the bathroom at the center - there's no chance along the way. Parking at the center 5 minutes from downtown PS.