Glen Loy is a glen or valley in the Northwest Highlands of Scotland which opens onto the Great Glen at its eastern end. It is drained by the River Loy which rises at a low col just under 230m above sea level as numerous burns drain the hillsides of Druim Fada on the south side and Druim Gleann Laoigh on the north. Further tributary burns drain the southwestern slopes of Beinn Bhàn, a 771m high Corbett and Marilyn to the northeast of the lower part of the glen. A minor road stretches up the valley from the B8004 road at Loy Bridge crossing the river once at Inverskilavulin Bridge before reaching a cul-de-sac short of Achanellan. A private vehicle track continues westwards up the glen from that point and in turn becomes a footpath which continues over the col and down through Gleann Suileag beyond.