Mount Fraught is the highest peak in the Mortmain Mountains. Its frozen waterfall is notorious for being Stricken Stream's headwater. In other words, it is the source of the river that only flows if the ice is pierced for a number of times.
Mount Fraught is home to the Snow Gnats, and the original home of the Volunteer Feline Detectives. A V.F.D. Headquarters was stationed nearby, but it was burnt to the ground by the Man with a Beard but No Hair and the Woman with Hair but No Beard not long before Violet, Klaus, and Quigley arrived.