Definitely a great State Park to visit. Lot's of areas to explore and visit. If you plan on visiting Jerome, I highly recommend you plan in the time to take the opposite end of 89A to leave. It would be a long full day of driving, but there are plenty of places to see, so start your day in Jerome early. If you enjoy a leisure and scenic view, don't go out the same way you came in. At one end you have Hampshire Avenue where the street is built right on the peak of the mountain. There are open areas to look around on both side, but you'll notice a few houses on either side of the road where the backs are on stilts. The other end has beautiful winding roads of trees and breathtaking scenic views. The best times to visit are Late Spring and Mid Autumn, however, anytime from Mid April to Early October, is great for visit. Note the town does get very busy, and traffic can sometimes be an issue. If you plan a leisurely day and are patient, your experience will go a long way. Pack snacks, and mind your fuel, but you can generally do the "Jerome Loop in about 2 to 2.5 hours in drive time. [IE: (Clockwise Route) Leave Prescott via 89A (East), then to RT-260 (South) in Cottonwood, Then to I-17/RT-169 (Southwest) from Camp Verde, Follow RT-69 (North) from Dewey-Humboldt, back to 89A in Prescott.] Whether you choose the clockwise or counter-clockwise route, it's probably best to plan going through the twisty and winding roads of 89A that are west of Jerome, during the daylight hours. So if coming from Sedona, you may want to take the loop counter-clockwise.