The route runs through rural areas as a two-lane road, passing through the community of Augustaville.

PA 890 begins at an intersection with PA 225 in the community of Trevorton in Zerbe Township, running north on two-lane undivided North 5th Street past homes.

Leaving Trevorton, the route becomes an unnamed road and heads west across forested Little Mountain.

After crossing the mountain, PA 890 enters a mix of farmland and woodland with a few scattered residences, turning to the north.

The road passes through Augustaville and continues through more agricultural surroundings with scattered woods and homes.