1 Dwalin: It's guid tae be on thu road aginn. {translation: It's good to be on the road again.}
2 Alvissa: Technically it's not a road. It's untrodden wilderness into the middle of the vast, trackless Dentorn Forest.
3 {beat}
4 Dwalin: Well, it's guid tae be makin' progress! {translation: Well, it's good to be making progress!}
4 Alvissa: I reserve comment.

I'm not sure what inspired the name "Dentorn Forest". Well, apart from it being a forest, that is. I think "Dentorn" was just a random name-like word that I came up with for no readily apparent reason.

Apparently there was a Dentorn family living in Ohio, USA, in the 1920s.

In a couple of near spelling misses, there is a Renee G. Denton who works for the US Forest Service; and there is an actual Denton Forest in Texas. I was a bit excited about Google returning these, until I realised that it had matched "Denton" instead of "Dentorn".

EDIT: As pointed out by a couple of observant readers, dent- is a Latin-derived prefix meaning "tooth", as in the words "dentist", "dental", and "dentures". This combined with the -orn ending^[1] makes it clear that this was a clever bit of wordplay on Fangorn, the forest where Treebeard lives, near Isengard, in The Lord of the Rings. This was enough to jog my memory that yes, this is indeed why I chose the name "Dentorn". Indeed, the very first strip in which the Dentorn Forest was mentioned makes a not-so-subtle allusion to the presence of ents there.

[1] What's more, orn actually means "tree" in Sindarin, one of the languages of the elves in The Lord of the Rings. This meaning can also be seen in mallorn, a name for one of the species of tree in Middle-earth. And fang actually means "beard" in the same language, so Fangorn is in fact the same name as Treebeard himself, just in an elvish language.