Mike, thanks for contacting the Extension office. The photos of your Boston Ivy are beautiful. I can see why you'd like to keep it. It is not English Ivy which can grow twice as long and can overtake shrub, tree, and landscapes. Your Boston Ivy generally maxes out at about 50 feet, and as you are seeing, gets beautiful colors in the fall. It can be pruned back if necessary.

Below are two articles about your Boston Ivy. Thanks again for contacting Ask Extension.

Susan, Yamhill County Master Gardener

Parthenocissus tricuspidata (Boston Ivy, Grape Ivy, Japanese Creeper, Japanese Ivy) | North Carolina Extension Gardener Plant Toolbox

Boston Ivy - Parthenocissus tricuspidata - PNW Plants