We went to Pine Valley today and located the petroglyphs that are next to the Santa Clara River. You can drive to about 100 yards of the river access trail. Take the trail to the river and follow to the site. The river in this area is really pretty. Some minor bush wacking and rock crawling might be required. We also located a mound area that look like it might have been a location for pit houses. Most of the panels are very faint.
Panel 1: 37°24'18.54"N 113°31'36.42"W
Panel 2: 37°24'18.36"N 113°31'37.74"W
Possible Pit House area: 37°24'11.76"N 113°31'31.92"W
Have fun.