BOU AVENUE
Mailbox Peak
Departing Kirkland, Washington on 9 April
2026, Zosia Zgolak and I stopped near North Bend to hike up
unofficially-named Mailbox Peak. Like many of the other
trail-accessible peaks in this area, Mailbox Peak is exceedingly popular
and is likely ascended year-round.
The summit can be accessed via two different trails--a newer one that
switchbacks gently up the northwest slope and an older one--dubbed the
"Old Trail"--that basically pushes straight up the west ridge.
Figuring that it would be a monstrous ascent either way with about 1200
metres of elevation gain, we opted to try the shorter but steeper Old
Trail.
From I-90 near North Bend, take Exit 34 and head north on 468th Avenue
for 750 metres before turning right onto Middle Fork Road. Drive
1.5 kilometres and keep left at a split (right is also okay but is a
one-way road). Drive 2.0 kilometres and turn left at a
T-intersection (one-way road joins in from the right). Drive 500
metres and either park in a pullout here or turn right and drive an
additional 240 metres to the upper parking lot for Mailbox Peak Trailhead
(vault toilet available). Note that a
Discover Pass is required to
park in the upper parking lot.
Starting at the upper parking lot, Zosia and I backtracked a little along
the access road to a gated gravel road splitting off at a bend.
About 140 metres up this gravel road, we passed the marked start of the
newer trail, and another 400 metres further, we reached a sign board at
the start of the Old Trail. This trail rises fairly gently for the
first few hundred metres, but then it begins to climb in earnest.
For the next several hours, we grinded up an unrelentingly steep trail
with no views whatsoever. The ascent is as much a mental test as a
physical one as it is easy to despair when facing such an uninspiring
uphill slog that never seems to end. With that said, the trail was
still astoundingly busy for the middle of a work week as scores of people
going up passed me with regularity. About three quarters of the way
up, the Old Trail crosses and then merges with the newer trail, and
shortly past this junction, we finally broke out of the forest onto a
huge talus slope. Although we still had more than 200 metres of
elevation gain left, just having far-reaching views here felt like a
small victory after all the previous drudgery. The remainder of the
climb, though uncomplicated, felt especially wearisome for me, and while
Zosia still looked fresh, I was running on fumes by the time I staggered
up to the summit cairn. The summit was quite crowded when we
arrived, and we had to drop a bit down the ridge on the far side to find
some solitude for our lunch break. The unobstructed views of
resplendent Mount Rainier helped alleviate some of my fatigue, but I was
already dreading the long descent as I tried to choke down some food.
Much of the crowd at the summit had dissipated by the time Zosia and I
commenced our descent. We faithfully retraced our steps all the way
down the mountain, but my feet were definitely hurting most of the way.
I constantly fell behind Zosia who waited patiently for me to catch up
numerous times. Surprisingly, we ran into quite a few people still
on their way up despite the lateness of the day. The sign board at
the start was a sight for sore eyes and feet, but even the final easy
walk down the road to the parking lot felt long and painful. At the
end, I did not really feel any great sense of accomplishment; I was just
happy I survived Mailbox Peak!

In this view to the west from near the top of Mailbox
Peak, Rattlesnake Lake and
Rattlesnake
Mountain are the most obvious landmarks across the valley.
 |
Sonny and Zosia stand on the summit of
Mailbox Peak (1479 metres). |

Here is the view to the north across Middle Fork
Snoqualmie River valley.