Leonie warned us this walk was not flat, in fact"almost vertical in places". Taken with a pinch of salt, but certainly in one or two spots I could have done with the faithful trekking pole. It's travelled with me, but I left it in the cottage. It was a case of put your feet sideways and don't slip on the dry sandy sections.
A great walk, from the town centre out on the Mt Diablo Boulevard for a good half mile or so to the reservoir, then up to the Rim Trail, and follow it anti-clockwise on its undulating course well above the water.
There are fantastic views of distant mountains, towns, woodland and the reservoir below. Wall to wall blue sky, a crowd of chickadees, turkey buzzards and one or two homo sapiens.
6 to 7 miles in all, including the walk from Lafayette centre.