Montesanos is located at 9905 S. Eastern in Las Vegas.
Traveling Southbound on Eastern away from the 215, just watch for the Asia Buffet literally right in front of you. At that point, Eastern curves slightly to the left. Take the very next right into the parking lot. Montesanos shares a parking lot with Asia Buffet.
Traveling Northbound on Eastern, turn left at the first stoplight North of St. Rose (at Pantera Bread) then immediately right into the parking lot. Montesano’s is ahead of you (veer just slightly right for parking).
Here is a satellite view of the location of Montesano’s Italian Restaurant in Las Vegas. Use the controls at the left to adjust your view. Also, you can click and ‘drag’ the image.