Not quite, but good enough for a feat.
Originally, Piper, Jason, Leo, and Hedge were in Aeolus's very own Castle in the Sky. Then he tried to kill them, so Mellie rocketed them all the way from Pike's Peak to Walnut Creek, California, right next to Mt. Diablo. Gonna be using ballistic trajectory for this.
http://www.distancefromto.net/
Pike's Peak is 1,486,900m from Walnut Creek, Cali.
Pike's Peak is also 4,302m in elevation.
So 4302 meters plus a fourth of a mile is 4503.168m.
http://www.convertalot.com/ballistic_trajectory_calculator.html
Using a theta of 0, that's a little more than 49,000m/s
or about mach 144.
:distracted
Not really gonna get into all that CoM business
Using 45 degrees, that comes out to about mach 11 :tomasulk