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What season are you hunting??
Follow the masses over Hwy 410 from the crest down both sides of the road for 30+ miles either way. That's where you will find the largest concentration closest to western Washington. Colockum is further north with good numbers but even more pressure. Good luck.
what weapon ?
Yakima units.. Scouting is kinda useless, you need to find spots that pressured elk run to and hole up. Bad part is you cant do this type of scouting other than when the boom sticks start going off. But once you find these spots you can sit down and the elk will come a running! Ive used this tactic and killed a whole bunch of spikes and cows. Finding elk right now will get you excited but most will change areas between now and hunting season.
You may want to reconsider your rifle option and try archery sometime? Much more peacfull and more of a hunting experience and not so much of a hearding the elk experience.......