My wife and I are in pretty good shape and mid 50 in age. This was a great hike and we got a great workout in! We did this hike 4-14-18 and it was cloudy and breezy so the weather was perfect and not overly hot. We had liking sticks and hiking shoes which we thought were a big plus. The trail is well maintained but a lot of rocks to deal with; old lava flows through the gulch. When we started out on the trail, we missed the three arrows stating “ go left” so we did an extra .2 mile there and .2 back once we got to a fence. Not sure how we missed it. It is really cool getting to the wind turbines. Very breezy and a cool humming noise. Reminded me of the movie Contact. We saw young couples with tennis shoes and even a 7 year old girl that did the trail. I just think it is rated hard because some of the trail is rocky and it is quite an incline. Give yourself 3.5 hours up and back at a minimum. Loved this trail !!