How do I deal with long travels?

My group has faced a lot of just traveling; so sometimes I just say it’s been 3 days since you started traveling, because I don’t really have anything big planned on that particular road.

However in a situation like what I’m planning, my party is going through an ominous forest, with a very crooked trail and its kinda scary. However it’s a long trail and in this forest theirs not much big events that happen, or even like big stopping points. The trail is literally just a long trail through an ominous forest; however I want it to seem like its a really long distance they’ve traveled through this scary forest.

Is there something that can help me with this?