SMC's referrence to Kerry's directions from the 2011 pink salmon thread leads to Young's Bar, not what I've known as Larson's for 40-some years. Larson's is across the river from the Sauk Store road, as mentioned by WW above. It is accessed from the south Skagit highway. Used to park at a pull out along the road, but there has been home of sorts there for going on 20 years now. Last time I walked into it was from a point further downstream, wading across a side channel - considerably larger than the old upper section side channel that led to it. Anyway, this route leads into Lower Larson's Bar, or what's left of it. Mainly there is a log jam there last time I went in. Cross the side channel near the upstream end of it and zig-zag through the woods a bit, and you come out on Larson's Bar. I should mention, however, that the 1990 flood, or was it the 1996?, turned the upper half of the run into a slackwater slough. The tailout was still there, and I did hook a fish or two in what was left of the run in the 90s. I haven't been there since 2008, so I have no idea what is left of it these days.
Sg