We decided to continue to explore the Mt. Rainier area with Kelly Butte. The FR 70 leading up to the trial was in pretty decent shape, but once you turn onto FR7030 then FR7032 it is all gravel, very washboard like ride for ~15 miles. It is doable and well worth the beauty of this hike.
We arrived at the trailhead at 10 AM to only 2 cars in the parking lot. The trail at the start begins in shaded forest then breaks out into exposed ridge/switchbacks for much of the hike. Once you break through the forest, watch for the small brown sign that says Trail--> to start going uphill via switchbacks. If you go straight at this junction, you will come upon the "old trail" which is basically a scramble up a steep slope with a snarled rope available for safety. Do yourself the favor and take the easier route. We were so transfixed by the great view of Mt. Rainier that we missed the trail sign and did the scramble with much huffing and puffing on an 80 degree day. The trail overall is steep, so recommend bringing those hiking poles to save those knees.
The hike has some impressive views. We didn't see much for berries but there was a lot of wildflowers. It was a beautiful clear day and we could see many of the major peaks (Mt. Baker, Kaleetan Peak, Granite Mtn, Denny Mtn, Snoqualmie Mtn, Glacier Peak, etc) from the deck of the lookout tower. We ran into the hikers who owned the cars at the top. They were great, friendly funny people! We did encounter a few people on the way back down and the small parking lot (~5 cars) at the trailhead was full by the time we got back to the bottom.
Highly recommend this hike on a clear summer day. You won't be disappointed!