Horse [& Cattle] Creek Trailhead, located inside the private campground at Annet's Mono Village. (Parking is available at the Upper Twin Lake marina.)Robinson Creek crossing.Upper Twin Lake.After several switchbacks, the trail follows Horse Creek.View back.View back.Horse Creek Peak visible ahead.The trail disappears as it crosses a moraine.Aiming for a small notch on the top-right. (Horse Creek Saddle is center, opposite a cavity caused by glacial recession).View back down the moraine.Class 2.Approaching the notch.From the notch, turning right toward Matterhorn Peak.Slogging up Matterhorn Peak's sandy southeast slope.View back toward Horse Creek Pass. Twin Peaks is on the top-left.View back.Approaching the base of Matterhorn Peak.Veering left toward a weakness in Matterhorn Peak's south ridge.Steep Class 2.View along the south ridge toward Whorl Mountain.Following the south ridge to the summit.Matterhorn Peak summit. View northwest along Sawtooth Ridge.View east toward Horse Creek Pass.View south.View south toward Virginia Peak (left of center) and the distant Mount Conness (right of center).Descending Matterhorn Peak's east slope.View along the Spiller Creek drainage.Rejoining the intermittent trail in the upper reaches of Horse Creek Canyon.