>>213469082
https://www.weblio.jp/content/森
>1 樹木がこんもりと生い茂った所。「—の都」
(ignoring definition 2 for 杜, but it is also referring to 2 神社がある神域の木立。「鎮守の—」)
Forest
https://www.weblio.jp/content/林
>1 樹木がたくさん集まって生えている所。「武蔵野の面影を残す—」「雑木—」
Forest (ignoring 2 同類のものが立ち並んでいる状態。「アンテナの—」)

https://www.weblio.jp/content/森林
>樹木、特に高木が群生して大きな面積を占めている所。また、その植物群落。
Forest, especially tall and tons of trees over a large area.
Looks fine to me. It's a big forest using onyomi instead of the others kun'. It has two different forest kanji which feels like bigger than one forest kanji.
Very reasonable word. I rate 9/10.