Pristimantis obmutescens is a species of frog in the family Craugastoridae. It is endemic to Colombia and known from the páramos of Cordillera Central in the Cauca and Huila Departments. Common name paramos robber frog has been coined for it. The specific name obmutescens is Latin and means keeping silent, inferred from the lack of vocal slits or sac in males and the thick skin covering the tympanum. Despite this, the species is reported to call.