The Department of Infrastructure says it's been forced to close part of Colby Glen.
It took to Facebook to say a landslide means the lower path and entrance have been shut.
The upper glen entrance and paths remain open.
It's not known how long the closure will run.
Repairs on Peel Power Station to get underway
Manx Care doctor survey to be discussed by Tynwald
Weather warning for snow tonight
MHK queries safety at primary school in Ballabeg
Gales put two ferry sailings at risk tonight
Should the Island throw a birthday party for Barry Gibb?
Warning issued over icy roads
High ground could see 4 inches of snow on Saturday night