Ah! You are correct. I had forgotten that the closure goes along the survey section line which is below the crest.
It does seem like a shame to not allow skiers on to the slopes, particularly since not that much burning occurred in the upper reaches of the South Fork drainage. I do understand that it takes work to define a closure area and that the more exceptions to straight lines (such as a survey section boundary) there are, the more work that is required, but it would be nice to see a few more areas opened up. For example, no burning occurred west of Forsee Ridge, yet things are closed all the way west to Manzanita Flat. Trail Fork Springs and Anderson Flat are both closed even though no burning occurred there.