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Botanist and iNaturalist Curator Alan Weakley reported that this is the species and variety from the Chincoteague National Wildlife Refuge along the Woodland Trail.

https://www.inaturalist.org/observations/19596912

There are other observations along the Woodland Trail identified as Elymus virginicus:

https://www.inaturalist.org/observations/40521084
https://www.inaturalist.org/observations/62922275
https://www.inaturalist.org/observations/41332902

There are closeup photographs at https://www.inaturalist.org/observations/53229089.

There is a description of this variety at
http://beta.floranorthamerica.org/Elymus_virginicus_var._halophilus.

Several characteristics mentioned can be seen in the photo.

Plants glaucous, ..., becoming reddish brown at maturity.

Spikes exerted...

Glumes ... bowed out in the basal 1-2 mm.

Could be Q falcata but I do not think it is. There seems to be domatia developing in the vein axils which Q falcata does not have. There is a large mature Q x willdenowiana about a 1/4 mile away from this tree. The more I look at a lot of these trees the more I think that there might be a hybrid swarm at this location.

Other tree https://www.inaturalist.org/observations/100654999