Note: Silver Mountain combines well with San Joaquin Ridge for a ridge-walk day. Therefore, this route description includes mileage and elevation for both summits and begins from the summit of San Joaquin Ridge. In addition, our assumption is that climbers do not have 4WD available, so the overall route begins from the trailhead off the Ophir Pass road.
From San Joaquin ridge, head back west to the false summit of Pt.13,446, losing and then regaining about 250 feet. Descend west from Pt.13,446 directly on the ridge on small, broken rock. As you lose elevation, you'll find yourself forced to the north side of the ridge and onto slopes strewn with loose rock. There will be some tricky drops that may require one-at-a-time maneuvering for a larger party. After dropping a good 50 feet off the ridge, keep contouring west across a similar loose slope, but not quite as bad. Approach a saddle just east of Pt.13,463. There are three choices here: A. Ascend up the steep face of the false summit by way of a couloir and continue across the top B. Contour at the saddle level around on the north side trying to stay just below the cliffs C. Descend on the north side about 100 feet to a rocky bench and contour west below Pt.13,463 to a saddle on the west side. Since we could not tell for sure if either option A or B would work at a non-technical level, we chose C. The descent to the bench was of moderate difficulty and the bench itself was comprised mostly of large boulders with some snow. An ice axe might be useful here depending on snow conditions. The ascent back to the saddle on the west side of Pt.13,463 was steep, rocky and unstable. This bench is evident on the USGS map. From the saddle, it's an easy scramble to the true summit of Silver Mountain, a rocky place with an outstanding view looking down on the Alta Lakes.
To descend to the Carbonero Mine, go back down the ridge to the east and at the saddle, begin a descent on small, loose rock. At times, there will be enough scree, for a scree-ski descent. Follow the rounded ridge and then drop into Spring Gulch, contouring across at about 11,800 foot level to some trees and the next ridge east. Make the easy contour across the next gully and drop on down to the Carbonero Mine. If you were able to leave a vehicle here, be thankful that all the rock scrambling is over. If not, keep walking on down the old road back to wherever you left your vehicle along the Ophir Pass road.