Not sure about US69. But just north of Denton are some pretty decent trails, Isle Du Bois (@11mi all loops combined) and Johnson Branch (@8mi all loops combined). Both State Parks on Lake Ray Roberts and @ 20-25 min from Denton. I rode Isle Du Bois today and it was in absolute perfect condition. I plan on going to Johnson Branch tomorrow. Both are fun beginner to intermediate skill level trails with some fairly challenging rock gardens, more so at Isle Du Bois. Do both if you have time.