I hiked Berkeley park trail, skyline trail, and spray park trail.
In terms of view, Berkeley park > skyline > spray park
In terms of hiking difficulty, Spray park > berkeley park > skyline
Skyline trail is easy to access and has a visitor center. If you can wake up
early, reflection lake is good to shoot mt rainer reflection.
Nerada Falls, Christine Falls and Myrtle Falls are easy to access too.