Started about 9:30am from Trailhead, arrived Summit ~1:30pm, 4 hours for ~ 5 miles with stop at Floating Island Lake and Cathedral Lake for morning lake reflection.
Met some hikers started 5:00am, she may back to TH about 10:15am, 7:00am, 7:30am arrived summit about 15 minutes later than me, 8:00am, 10:00pm on the way from Sacramento (started from Sac ~7:30am) arrived summit a little bit earlier than me.
One hiker submitted in 2 hours and 12 minutes, almost half of my timing.
Back to Trailhead about 5:15pm after ~1 hours on the summit.