From the trailhead where California and Placer Gulches join, walk south up the road that heads up Placer Gulch. If the road walking is too boring, you could walk down in the creek bottom. The willows are not too bad. As the road approaches the Gold Prince Mine, take a few minutes to look among the ruins, then continue following the road to a somewhat flat area at 12,600 ft., where the road will turn sharply east. (Parking available here for 4WD.) From this point, walk SW on mostly tundra to a saddle that's south of the Hanson summit. At the saddle, turn north and finish the last 300 feet of gain on scree and rock.
When you arrive at the summit, try to find Lake Emma, indicated on the USGS quad as SW of the summit. (Hint: you won't find this lake because it was accidentally drained by mining activity.) To read an interesting story, check out this link:
When it's time to head down, why not try another route to add a little interest to an otherwise uneventful hike? We hiked down on the east flank and at about 12,800 feet found a nice bench area with a small tarn and beautiful, lush grass with a small creeklet that flowed from a snowbank. This place just invited a leisurely time to cool your feet and eat some lunch. Then you can just continue on down with one steeper slope of rocks to negotiate to get back to the road. Hike on back to your vehicle - wherever you left it, or make a short jaunt east along the road and tag UN13,075 before calling it a day.
Bonus Points: Climb UN13,075 while you're here. It will take less than an hour. Then also include California Mountain, north of Hanson. California is classified a "soft rank" summit, so it might be worth the effort. You can easily exit east from the summit of California and descend mostly tundra back to the road in Placer Gulch and return to your vehicle.