Yes, by mid August for sure. I went over the pass in early August last year with a full pack and had no issues. The hardest part is navigating the big slabs and boulders below and adjacent to the snow field. Avoid the long prominent track that cuts diagonally across the snow field. The actual pass (with park sign) is higher up on the left. It think it is easier to navigate this snowfield in a heavy snow year than a light one -- better traction for your boots.Mike M., I was surprised by this comment since Lamarck Col is a high cross-country pass (albeit a common route). I actually haven't been over it but have a permit to go from North Lake over Lamarck Col in mid-August. So you think it likely to be non-hazardous by then? Thanks.
If you are exiting at Lamarck Col and headed out to North Lake, travel is easy once you get down to the little tarn below the pass. Lower down the broad sandy slope, look for the exit trail (on left) that takes you over and then down a ridge towards Upper Lamarck Lake via a well-defined set of switchbacks. That trail eventually intersects the outlet stream to Upper Lamarck Lake.
Mike M.