Arghh... In an area famous for it's tormenting winged devils, I must say that this hike takes the cake. yeesh...
Trail starts out at the end of annoyingly but not hinderingly potholed Ruth Creek Road. This 5 mile section of trail along Ruth Creek to Hannegan Pass is in nearly immaculate condition. Brush has been recently cleared and the tread is well maintained and engineered. Black flies here are an annoyance but not a real threat to enjoyment. I was surprized how scenic this trail is. It stays in avalanch slopes most of the way, high on the valley wall with good views of Mt. Sefrit across the valley and Ruth Mountain at the valley's head. This hike to Hannegan Pass would make a good daytrip.
The views from the pass are pleasant, but I think they would much improve as you make your way higher, either on the path towards Ruth, or preferedly up to Hannegan Peak. On my three day trip, I did not have the time or energy for this sidetrip on the way in or out.
Once the pass is reached the trail switchbacks down into a small alpine hanging valley and makes its way nearly flat until forest is entered and the long descent deep into the the deep Chilliwack Valley is made. Just before this forest is entered is Boundary Camp. This is where the black flies become truely maddening. Swing your arms and be amazed as they whack into about fifty of the crazy things. Try to get a gulp of water down your heat parched throught and be disgusted at the five flies flailing in your drinking water. Move on not because you like hiking anymore but because that is the only option, your only way out.
Anyway, once the trail reaches the bottom of the valley at Copper Creek, another campground is passed. The trail is nearly flat for about four miles as US Cabin Camp is passed. This is where I spent both of my nights. Soon after, the river is crossed on an interresting cable car. Basically it is a bucket with a rope attached to it that you pull yourself across on. As only two people can cross at one time, large groups should plan some extra time accordingly.
From here, the trail climbs a little to the crossing of Brush Creek and a juncion. Go right for the pass which is a little over 5 miles distant.
At this time this trail has a very annoying problem with brush (brush creek:). This starts in avalanch paths at the bottom of Chilliwack Valley (particularly bad on either side of US Cabin Camp) and continues all the way up Brush Creek to Whatcom Pass. The trail is never lost because its orriginal engineering was good, but at times the tread cannot be seen and this makes for an easy twisted ankle. Also, morning travel on clear days or any travel on a rainy day will quickly leave one soaked from at least the waist down.
Seeing as this was only a three day trip, I was forced to make the trip to Whatcom Pass a marathon day hike, about 15 miles. This was fairly challenging but doable for hikers in good shape (at least with a minimal pack). I highly suggest taking about three quarts of water (or taking a filter) or at least bloating one's self before the trip and taking two quarts (what I did). I was on the verge of being severely dehydrated at the end, but it was a hot day.
The trail doesn't break out into meadows until just before the pass (flowers are past their prime). Deja Vu, the views from the pass are pleasant but I'm sure they drastically improve as you gain elevation. One popular area is Tapto Lakes just north of the pass. Redface Mountain just north of these lakes appears on the map to be a simple scramble and would provide good views of the Pickets. Of course, with my hike already at 15 miles, I did not have time or energy for either sidetrip. The one good view I did get was that of Mt. Challenger from a knoll just south of the pass. This is a good view but does not justify the hike. I HIGHLY suggest taking more time here than I did and camp either at Whatcom Camp (just below and to the west of the pass) or Tapto Camp at Tapto Lakes. Do some exploring. Climb Whatcom Peak if you feel so inclined. I really think the area would be very much worth the trouble if you give it time. But I did not so I left somewhat saured. I'll be back someday, hopefully to climb something in the Pickets. If there is one good thing Whatcom Pass does offer right now, it is the lack of flies. They were conspicuously absent.
The trip back to the car was uneventful but the flies seemed to be getting worse every minute.