It’s a Halo 2 map. Not an Anniversary map. Not complaining bc I like the map but with the limited maps in the anniversary list, this map seems out of place.
The Anniversary map pack was meant to be a celebration for ten years of Halo, not ten years of Halo CE.
They didn’t want to remake any Halo 3 maps as they were already playable via Xbox LIVE, while Halo 2 maps weren’t (minus PC), so they chose the five Halo CE maps and Headlong from Halo 2.
Its a fan-favorite I think. Always enjoyed playing it.
Beaver Creek is also the Halo 2 remake of Battle Creek. So in a sense they remade 2 Halo 2 maps.
Headlong and Beaver Creek being remade in Halo: Anniversary is proof that there will be NO Halo 2 Anniversary 
Thought it was a good amount of fun when I played it with Reach. Team Snipers was pretty slow on that map though.