  Primordial Black Holes (PBHs) created early in the universe are dark matter
candidates. One method of detecting these PBHs is through their Hawking
radiation. PBHs created with an initial mass of 5.0 x 10^14 g should be
evaporating today with bursts of high-energy particles, including gamma
radiation in the GeV - TeV energy range. The Milagro high energy observatory,
which operated from 2000 to 2008, is sensitive to the high end of the PBH
evaporation gamma ray spectrum. Due to its large field-of-view, more than 90%
duty cycle and sensitivity up to 100 TeV gamma rays, the Milagro observatory is
ideally suited for the direct search of PBH bursts. Based on a search in
Milagro data, we report PBH upper limits according to the standard model.

High Energy Astrophysical Phenomena