Did as part of my big Glacier Peak Wilderness Trip where we climbed Emerald, Cardinal (including its south peak), Saska, Pinnacle, South Spectacle Butte, Fernow, Copper, Flora, Martin, Bonanza and Dark Peaks. 9 days, 78.5 miles, and 44,300 feet gain!
A 4 day trip with Heather right after she returned from her speed record hike of the Appalachian Trail. We had planned on doing both the Spectacle Buttes, however part of the Wolverine Fire was still burning on the west slopes of South Spectacle and we decided it was not safe to attempt the south peak. Check out the trip report for more details.
UPDATE: I returned July 20, 2016 to climb South Spectacle as a day trip. It took 18.5 hours car-to-car. Bulger 64/100 trip report