Gorgeous views and 50 degree temperatures. Started from the parking area at 8:15pm and reached the summit at 8:48pm, but only because I ran some of the trail. It was windy at the summit, but not too cold.
At 20 minutes from my home, it can't be beat. Easy climb with a bit of a scramble for the last 200ft. Great views of surrounding peaks. If you're lucky enough to go on a clear day it's possible to see McKinley if you know what you are looking for. Lots of people mistake it for a cloud formation on the horizon. Very crowded on a nice day though.
I first hiked up Flattop Mountain as part of a Hanshew Junior High School cross-country running team practice. We went the standard route. Many subsequent trips have occurred, some from the Canyon Road trailhead and some from the Powerline Trail to the north. A recent trip was on September 30, 2006, with my five-year-old niece for her second ascent of the mountain. I climbed Flattop Mountain again on March 14, 2008, and again on May 10, 2008.