Found this laying on the woods in NH while hiking and can not identify it, any help would be grateful.
The only beech native to North America is Fagus grandifolia (as far as I know) and its seed pods are more elongated and less "spikey" than the pic above.
Just a guess, but it may be an acorn from a burr oak (Quercus macrocarpa) that never matured.
agreed. it looks like Fagus sylvatica, or a similar sp. Not a native, but not rare in NH either.