The Trinity Divide encompasses the high mountains beginning with China Peak in the north all the way to Shasta Bally in the south and generally divides the Valley of the Trinity River in the west from the Sacramento River Canyon in the east. It is an area of rugged peaks, emerald green meadows, rushing streams and gorgeous alpine lakes. The Sisson-Callahan National Recreation Trail visits the heart of this country. The entire length of the trail is visited with stunning views of Mt. Shasta, Mt. Eddy, Castle Crags and the Trinity Alps.

The trail crosses Deadfall Summit above Deadfall lakes at the 8,020 foot elevation. Spring hikers will likely find snow at the summit well into early summer and yet be able to enjoy the heady fragrance of azaleas in bloom down along the North Fork of the Sacramento River. From Deadfall Summit it is an easy walk to the top of Mt. Eddy for an awe inspiring view of the surrounding country.

An amazing variety of conifer species occur throughout the area, and wildflowers carpet the meadows and hillsides. Water is plentiful and campsites are found at frequent intervals along the trail. Fishing is popular along the North Fork of the Sacramento River, which the trail follows closely, and at Deadfall Lakes near the western end of the trail.