This is a fairly easy trail to hike with good views to both the East and West of the park. I did find the blazes to be a bit confusing and didn't the didn't match up with the guide. Follow the turns in the guide, but don't rely on the colors. The map in the guide is also out of date, the park has added an additional section of the yellow trail that is about 2.5 to 3 miles long and does not take you to the blue trail. The map in the guide book does not leave the yellow trail before it intersects with the blue (catoctin) trail. The actual yellow trail no longer follows along the power lines, so when you first meet up with the power lines after crossing Gambrill Park Road follow the guide book, not the map, and dont follow the yellow blazes across the utility corridor. The utility corridor should take you to the section of the yellow trail that will intersect with the blue trail. Besides that mix-up I enjoyed the trail, and after doing the additional 2.5 miles or so in the Yellow Upper Loop, I did the trail in about 3 hours. I didnt find anywhere to refill on water for me or my dog, so bring plenty with you. There's plenty of shade from the trees but it can get pretty hot. The trail also has some sections that are very rocky, so I would advise wearing shoes that have good ankle support. I'll try to post back again later after doing the trail correctly and post how long it took me. As for the overlooks, they are technically closed at dusk, but I definitely recommend checking them out at night, they provide excellent views and the lights of Frederick are quite remarkable.