You lose another 250ft in elevation when you reach Santa Rosa Creek. Cross the creek the best way you can. I found a little log and some rocks to balance on so I didn’t get me feet wet. Continue on the road on the other side of the creek. Follow the signs at all intersections to Mt. Hood. Ignore the Summit Trail branches unless you want to add some distance and adventure to your hike. The Summit Trail eventually gets you to the summit, but the road is shorter and has better footing.
The trail is well marked all the way to the summit. The summit has a small round clearing with at least 3 trails entering from various directions. The actual highpoint is hidden in the bushes on the southeast side of the clearing. There is a register hidden in the rocks if you want to leave your mark on the historic occasion of your visit to the summit of Mt. Hood.
The overall hike is about 11 miles and took me about 4 hours. There is about 2,800ft of elevation gain including what you lose and regain from the trailhead down to the creek.