If you start at the top, the boundary is Main Street. Everything on the south side of Main go to McKinley, everything on the North go to North Park.
This goes East to the River. Everything on the West side is sent to McKinley.
If you are on the West side of the river, all the kids down to I-15 are going to McKinley.
I-15 becomes your new boundary until W 10400 N. Everything on the North side of I-15 is going to McKinley.
Kids on both sides of W 10400 N are going to McKinley, from I-15 to N 8400 W.
Kids on both sides of N 8400 W are going to McKinley, from W 10400 N to Main Street.
Main Street is the divider with North Park.