Well, there is plenty to do over there... The trail starting from Paradise is of course amazing, and it keeps going all the way to the top if you have the right equipment, guide, and two days. Other than that, there are good starting points everywhere. One of my favorite is the trail that starts at mirror lake and goes on top of Pinnacle Peak. On a clear day, you will have Mt. Rainier on one side, and be able to see Mt. Adams, St. Helen, and even Mt Hood in Oregon. Go to the Ranger station and let them advise you, I haven't even scratched the surface of what you can hike there. Enjoy!