OverviewMarble Peak is a minor summit 19 miles east of Granite Falls, WA. While not nearly as impressive as its big brother (Hall Peak), it offers many of the same views for far less effort. Marble makes an excellent early season ascent, but can be done fairly easily any time of year. The most difficult portion of the climb starts within 20 paces of your car - crossing the South Fork Stillaguamish River. Park near the interpretive sign for Marble Pass.
When the water is not too high, one could wade across the river at this point, but I found it much easier to float across in my $15 inflatable raft. (At this point, according to the Cascade Alpine Guide, you have the option of heading upriver and taking Marble Gulch/Marble Pass to complete the climb. To me, the ridge on climber's right of Marble Gulch looks much simpler and safer, so that is the route described here.)After stashing your hip waders or raft, just plunge into the woods and start heading straight up. It is fairly open forest without too much brush to contend with. The first 500' of the ridge is the steepest, and the overall angle will get progressively shallower as you ascend.
Once above 4000', you have two options: 1.Stay on the ridge, making minor detours to the right to avoid rock steps, or 2.Drop off the ridge to the right, and make a rising traverse to climber's right in the basin below the summit block. From here you can join the SW trending summit ridge for an easy scramble to the top. Option 2 is probably easier, but the basin below the summit should be avoided if there is any avalanche potential. Despite its short stature, Marble Peak provides nice views, including a good look at Copper Lake and Vesper Glacier.