A nice trail going thru different temparature zones and resulting ecosystem. if its the rainforest like feel in the deep ravine trail, its the virtual hard rubble brush in the upper fern creek trail. Would rate it as an easy to moderate depending upon the hiking level. we are an east bay based hiking group and have trained on the mt. diablo for longer hikes. comparitively this is mellow and not much challenges . the only difference was the length which makes it seem tougher. The climd upto panatoll staging area is very scenic and lively. beyond depending upon the path you take - old grade road or matt davis trail to upper fern creek - it can be easy or tough. we took the fire road and it turned out to be an easy hike, except for the sun which was out hot and bright,. the view from the top is amazing and worth the hike. on the way back took the rock scamble behind the lookout and then the fern creek trail. it was a good downward trail, well maintained. the trail from panatoll to the beach thru matt davis travis is mostly smooth except for the switchbacks which caused the max strain. overall a good long hike.