I heard about this when I visited the FSSP ordinations in Denton, Nebraska. The Pilgrimage is 63 miles for those walking the full thing, accompanied by the Traditional Mass.
'Walk all three days through the Adirondacks, 63 miles, from the Lake of the Blessed Sacrament (aka Lake George, NY) to Our Lady's Martyrs Shrine, Auriesville.' The dates are Friday - Sunday, September 23 - 25. See their website.
Pretty cool, eh? If you find yourself on the wrong side of the Atlantic Ocean this Summer, then why not join the LMS Pilgrimage to Walsingham, for the Conversion of England - about 55 miles from Ely to Walsingham, again over 3 days, 26th-18th August. Book here.