This big plant and several others, all blooming, are around an area that’s usually swampy but this year it’s dry. I was surprised to see it because all the ones in people’s gardens finished blooming weeks ago. Beautiful! This is the same woods that has the regular mountain laurel. Heath family. Native to eastern North America.
Great Laurel, Great Rhododendron (Rhododendron maximum)
Bonus picture: The rhododendron was along a shady trail, a very short walk from a sunny field full of fleabane, black-eyed susan, and red clover.