We present a sample of 20 runaway M dwarf candidates ( RdMs ) within 1 kpc of the Sun whose Galactocentric velocities exceed 400 km s ^ { -1 } .
The candidates were selected from the SDSS DR7 M Dwarf Catalog of ( 68 ) .
Our RdMs have SDSS+USNO-B proper motions that are consistent with those recorded in the PPMXL , LSPM , and combined WISE +SDSS+2MASS catalogs .
Sixteen RdMs are classified as dwarfs , while the remaining four RdMs are subdwarfs .
We model the Galactic potential using a bulge-disk-halo profile ( 28 ; 15 ) .
Our fastest RdM , with Galactocentric velocity 658.5 \pm 236.9 km s ^ { -1 } , is a possible hypervelocity candidate , as it is unbound in 77 % of our simulations .
About half of our RdMs have kinematics that are consistent with ejection from the Galactic center .
Seven of our RdMs have kinematics consistent with an ejection scenario from M31 or M32 to within 2 \sigma , although our distance-limited survey makes such a realization unlikely .
No more than four of our RdMs may have originated from the Leo stream .
We propose that to within measurement errors , most of our bound RdMs are likely disk runaways or halo objects , and may have been accelerated through a series of multi-body interactions within the Galactic disk or possibly supernovae explosions .