Campsis radicans is blooming near the Barmouth gap (on the Cynwyd side) and maybe in other places too. The bright orange flowers of this spectacular native vine are mainly bird pollinated. It is a vigorous thing, but is struggling a bit because of all the competition from invasives. This species is considered to be native to the southeastern US, but it's happy here. Note the pinnately compound leaves--this should help us distinguish it from the invasive vines we are trying to control.
Trumpet creeper is in a tropical family, the Bignoniaceae, that mostly isn't found up this far north. Catalpa is the only other common one in our area--and the beautiful Catalpa trees on the trail finish blooming just before the trumpet creeper starts.