The Mount Catherine trail is lightly used, despite being near busy Snoqualmie Pass. The trail leads to a 5000' summit, an old lookout site, which provides a spectacular vista of peaks near and far. The trail is only about 2 miles long and takes just a few hours to hike.
To find the trail, drive up the Cold Creek road from Hyak almost to Windy Pass. Look for a rocky, narrow spur road branching off to the right (uphill) and park nearby. Walk up the road, which is actually the unmarked start of the Mt. Catherine Trail.
The hiking is initially tedious as the road climbs up through a recent clearcut. However, views of Tinkham Peak's massive northern cliff helps to make up for the heat and lack of shade in the clearcut. After a quarter mile, you leave the road behind and begin hiking on real trail, which switchbacks steeply upward out of the clearcut and into shady old growth timber. The trail is in surprisingly good condition despite years of neglect. With a little tread work, cutting of a few downed logs, and a bit of brushing, this trail could be made quite nice again.
At length the trail tops out onto a ridge, and the grade relents a bit. The next section of the trail follows the ridgeline; the walk along the ridge, forested with large old-growth mountain hemlocks and grand firs, is exceptionally pleasant. A few patches of snow remain in places, not enough to be any problem for hikers. In winter, the plateau-like ridge top could be a great place to ski tour, if you can find a way up the steep, avalanche prone slopes below.
After a rolling climb along the ridge crest, the trail breaks out onto blueberry covered slopes, with great views in every direction. The trail passes a flat spot with rusty junk scattered about ( an old cabin site?), then climbs steeply to the rocky summit of Mount Catherine. Right on the top of the peak, a lone, unusual (for here) whitebark pine braves the tough growing conditions.
Sit back and enjoy the view, if the newly hatched hordes of mosquitos will let you.