My husband and I are in pretty good shape and this was a very challenging, but extremely enjoyable hike. We are here on vacation from Indiana and wanted to see a bit of nature (do something other than wine tasting!) and thought we'd start with this. It took approximately an hour and 15 minutes to get to the top---this included several breaks for taking pictures, enjoying the scenery and various views, drinking water, and sitting to enjoy a banana once at the top. The views changed dramatically depending on what elevation you were and which curve of the mountains you were on---very beautiful. From ground, it doesn't do the height justice as several smaller hills are blocking your view from how high you will actually hike. Coming down was of course quicker, but we had to be extra cautious because of the steep decline and loose rocks, etc. but still great exercise! In total it took us 2 hours and 10 minutes to get to the top and back to our car; however, it could take much less for those who aren't as interested in sight-seeing and are more focused on the physical benefits of the hike---we did burn approximately 1000 calories (~900+ for me and ~1100+ for my husband). We went in the morning hours to beat the heat of the day--there is no shade at all. I would highly recommend this hike to any teenager or adult who considers him/herself physically fit. This hike requires good stamina as well as balance and stability. One thing I will add is that it is a bit difficult to find. Once on Stewart Canyon Road, after crossing under the freeway, immediately turn right on Pankey Road and park on the right. The trail entrance is on the opposite side of the road (you will see a small 'conservatory' sign). On Pankey, if you've reached the cul-de-sac, you've gone too far. Turn around and park on the side of the road just before Stewart Canyon Road. I will post pictures later. Very rewarding once you reach the top! Do it, you won't regret it!