From the Silver Creek Trailhead hike up the trail to the junction with the trail that goes up the South Fork basin. Cross Silver Creek and the South Fork of Silver Creek and gain Sundog's northwest ridge. When I did it there was a nice snowbridge across the Silver Creek and I ended up crossing the creek about 100 yards south of the trail junction. It doesn't really matter what path you take - just try to gain the ridge as soon as possible.
Once on the ridge the route finding becomes trivial. The ridge is surprisingly sharp - even at low elevations through the trees - and it is easy to stay on the crest. Although it looks intimidating from below, there is no bushwhacking involved. The forested section of the ridge is mostly shrub-free and the going is easy. There is a bit of deadfall to avoid but this is easily done.
It took me an hour from leaving the trailhead to reach timberline. From timberline just follow the ridge to the summit of Sundog. The ridge is mostly well-packed, stable talus.
From timberline it took me another hour to reach the summit of Sundog.
No special gear is needed. Just take standard gear for hiking in the mountains.
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