We went here yesterday, a Sunday in August, and didn't get onto the trail until around 1pm. We started on the Purisima Creek Trail, which was entirely shaded (which we prefer on a hot day!). There weren't too many other hikers, and we didn't see any horses, although we saw plenty of evidence of them on the trail. Craig Britton is a single file path, and still mostly shaded. There are some beautiful views of the coast and you can see above the fog. Once we got to Harkins trail, we were mostly in the sun and it got pretty hot. It gets more crowded towards the parking lots, and although there were some tourists towards the end of the trail, we didn't see many other hikers during the three hours we hiked. As far as wildlife, we saw some quail, a banana slug, and some other small birds. Can't wait to do it again!