  We report on a 60 degree-long stream of stars, extending from Ursa Major to
Sextans, in the Sloan Digital Sky Survey. The stream is approximately 2 degrees
wide and is clearly distinct from the northern tidal arm of the Sagittarius
dwarf galaxy. The apparent width of the stream suggests a progenitor with a
size and mass similar to that of a dwarf galaxy. The stream is about 21 kpc
distant and appears to be oriented almost perpendicular to our line of sight.
The visible portion of the stream does not pass near any known dwarf galaxies,
though we cannot rule out that the stream may form the inner part of a known
dwarf galaxy's orbit. The most likely explanation is that the stream
constitutes the remains a dwarf galaxy that has been completely disrupted at
some point in the past. We also briefly report on the discovery of a diminutive
Galactic satellite which lies near the projected path of the new stream, but is
unlikely to be related to it.
