  Archival HST/ACS data reveal details of a light echo around SN 2003gd in the
galaxy M74, only the fifth supernova around which resolved echoes have been
reported. An echo is detected 0."3 from the supernova between PA 250--360, with
fainter signal present at a few other position angles. This material lies ~180
pc in front of the supernova, with a thickness of 60--120 pc, and may delineate
the disk of M74. This structure has a gas density of 1--2 cm^{-3}, typical of
the interstellar medium, however, the dust grains are smaller than those found
in our Galaxy, with maximum grain sizes around 0.25micron. Since only one epoch
of data exists, in two wavebands and with low signal-to-noise, deeper, annual
visits should be made with HST and ground-based adaptive optics telescopes.
