Wal­lace Creek (dry most of the year) cross­es the San Andreas fault and pro­vides evi­dence of the of the motion of earth over the past 3800 years. An inter­pre­tive trail shows how the once-straight creek was twist­ed by large earth­quakes every few hun­dred years, result­ing in the right-angle bends in the creek today, geol­o­gists call this fea­ture an off­set chan­nel. The inter­pre­tive trail is a total round trip of 1.4 miles.