The Izaak Walton Inn is a historic inn in Essex, Montana, USA. It was originally built by the Great Northern Railway in 1939 for lodging railway workers. In addition to railway lodging, the hotel was also originally envisioned as a potential official southern gateway to Glacier National Park, but that plan never materialized. Today, the inn is at the only request stop on Amtrak's Empire Builder route. A van from the inn meets both the morning eastbound and the evening westbound Empire Builders to convey passengers between the Essex station and the inn.
The Tudor Revival inn was listed on the National Register of Historic Places in 1985. The inn has 33 rooms for rent within the inn itself, with some other space available in refurbished cabooses, EMD SDF45 Diesel Locomotive 441, etc. It is privately owned. The Izaak Walton Inn is open year-round, except for several weeks during the off season.