Hike the Squire Creek trail to the second large stream crossing (the first one has a log bridge now). Cross the creek and turn right following the climbers path down to Squire Creek. Cross on the beautiful log, walk a hundred feet upstream and turn right up the dry creek bed. Follow this several hundred yard up till the climbers track heads into the woods on the right (typically cairned). Go uphill on the trodden path till you hit the bivy site. Head up the slabs past the short fixed rope and then work your way left along the base of the wall traversing till you get to the base of the route. 2.5 to 3 hours to base.
Excalibur is 10 pitches rated at 5.10a A0. All hard sections are closely bolted for easy aiding. Bring two ropes for double rope rappel down route.
Gear to 3" with an emphasis on fingers to small hands (BD .3 - .75). 15 draws with some double lengths.
Consult cascadeclimbers.com for numerous TR's on route, including FA trip report.
Climb for members of Alpine Rock Course. Contact Chris at firstname.lastname@example.org about possibly adding on if there's space.