I did this via the Smithfield Dry Canyon route (trail was covered in vegetation). I went to the summit of Flat top first and then over to Jardine. There was a faint trail and it was really slick in spots. The final push to the summit involves some scrambling.
I climbed Mount Jardine from Green Canyon. It was cloudy in the morning but the weather improved in the afternoon. I wasn’t sure what to expect since this area is often overlooked. It turned out to be a great day and I recommend climbing this mountain. There was snow above 9,000 feet. From the summit, I could see all the way from Doubletop Mountain to Logan Peak.