The freeway continues north along the western edge of the Sacramento Valley, passing through farmland and several small towns before reaching the end of the valley at Red Bluff. I-5 then traverses the rugged Shasta Cascade region, passing through Redding and crossing Shasta Lake before beginning its ascent towards Mount Shasta. The freeway follows the Sacramento River upstream to the southwestern slopes of the mountain and turns northwest to reach Weed, where it intersects US 97, a major highway serving the Inland Northwest region. I-5 continues through Yreka in the Shasta Valley and follows the Klamath River into the Siskiyou Mountains, where it crosses into Oregon.
The freeway continues north along the western edge of the Sacramento Valley, passing through farmland and several small towns before reaching the end of the valley at Red Bluff. I-5 then traverses the rugged Shasta Cascade region, passing through Redding and crossing Shasta Lake before beginning its ascent towards Mount Shasta. The freeway follows the Sacramento River upstream to the southwestern slopes of the mountain and turns northwest to reach Weed, where it intersects US 97, a major highway serving the Inland Northwest region I-5 continues through Yreka in the Shasta Valley and follows the Klamath River into the Siskiyou Mountains, where it crosses into Oregon.