assuming you know where to pick up the herd path from north loon (just down walking boss trail on the right where a sign about out of bounds skiing gives it away) the start of the route is easy following a well defined bootleg trail. somewhere close to a mile the trail makes a hard left/north turn towards black mountain (hard to miss) and you can start your bushwack from there or backtrack a little bit and head in. instead of taking a bearing right on the summit of west scar i'd suggest aiming for the ridgeline to the southwest of the summit and once you reach that ridge turn due east to the top. i have found that keeping to the south side of the ridge on the final approach to the peak keeps you in better woods. navigating back down is trickier as the somewhat ill defined ridge that leads back down to the bootleg ski trail is easy to walk off of while descending, but that is where you could consult the gps track you made on the way up if necessary. i do have a couple saved tracks for that route if you'd like them to get an idea of the layout. drop me an email.
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bryan