Are you staying in the city centre? Clydeside you could go east or west. Also there's bellahouston and pollok park over the southside where the 10k,s are routed through there. North side you have the canal as suggested.
Even google a jog Scotland group and join them while you here and that way you'll have company and won't get lost, they usually are quite welcoming.
Welcome to Glasgow and enjoy your running!!