We’ve seen this menu cover before in the book of Corinthian paper cover stock. The photo shows the Columbia River from Crown Point before the Oregon State Highway Department built its first highway on the floor of the gorge. That highway opened in 1954 and is shown on a later menu cover.
The menu interior indicates it was used en route to or from the Shriner Recorders convention in June, 1950. I haven’t been able to find where that convention took place. The menu itself offers table d’hôte meals of salmon, lamb chops, or ham for $2.50 (more than $25 today). This seems high considering that the salmon dinner was just $1.65 on yesterday’s 1950 menu.