We describe a newly discovered detached M dwarf eclipsing binary system. This system was first observed by the TrES network during a long-term photometry campaign of 54 nights. Analysis of the folded light curve indicates two very similar components orbiting each other with a period of 1.12079 +/- 0.00001 days. Spectroscopic observations with the Hobby-Eberly Telescope show the system to consist of two M3e dwarfs in a near-circular orbit. Double-line radial velocity amplitudes, combined with the orbital inclination derived from light-curve fitting, yield Mtotal = 0.983 +/- 0.007 Msolar, with component masses of M1=0.493+/-0.003 Msolar and M2=0.489+/-0.003 Msolar. The light-curve fit yields component radii of R1=0.453+/-0.060 Rsolar and R2=0.452+/-0.050 Rsolar. Although a precise parallax is lacking, broadband VJHK colors and spectral typing suggest component absolute magnitudes of MV(1)=11.18+/-0.30 and MV(2)=11.28+/-0.30.