BOU AVENUE
Thirsty Mountain And Webb
Mountain
Wrapping up our summer road trip on 8 August
2026, Zosia Zgolak and I made plans to climb Webb Mountain located on the
west side of Lake Koocanusa in Montana's Kootenai National Forest.
We got the idea for this objective from
Brandon Boulier
who climbed up the east ridge via the Pacific Northwest Trail, an ascent
that entails over a vertical kilometre of elevation gain. We
originally planned to do the same, but while we were camped at the
trailhead the previous evening, I was doing some research on my phone and
discovered that the fire lookout tower atop Webb Mountain has been
repurposed as a rentable shelter and can be accessed by a well-maintained
road. With plenty of daylight left, we continued driving and ended
up camping at a crossroad between Webb Mountain and a higher peak to the
west officially named Thirsty Mountain which can also be accessed via the
Pacific Northwest Trail. Since we saved ourselves a boatload of
distance and elevation gain, we would also try and tag Thirsty Mountain
at the same time.
From State Highway 37, turn west onto
Koocanusa Bridge 85.6 kilometres east and north of Staff Sergeant Arthur
J Rambo Memorial Bridge in Libby or 20.9 kilometres west and south of the
junction with US Highway 93. At the west end of the bridge, turn
right onto National Forest (NF) road 92. Drive 4.3 kilometres and
turn left onto NF-337 (2WD gravel). Drive 13.8 kilometres and turn
left onto NF-7179. Drive 5.2 kilometres to a 3-way junction.
Park here. The gated road (NF-7179F) to the left leads to the top
of Webb Mountain while the double trailhead for both Webb Mountain and
Thirsty Mountain Trails (Pacific Northwest Trail) is about 40 metres
further along the road (NF-1921) to the right.
Starting from the double trailhead, Zosia
and I first headed west along the Pacific Northwest Trail (FT-436).
After going over a low bump, the trail climbs up the east side of Thirsty
Mountain but ultimately veers southward without reaching the summit.
We had hoped to find a side trail or beaten path leading to the summit,
but having no luck, we simply abandoned the trail and bushwhacked up the
south ridge. There was quite a lot of toothpick deadfall and even
some surprising cliffs guarding the south ridge, but we had no problems
surmounting these obstacles. The viewless summit is completely
choked by forest, and we only stopped long enough to quench our thirst
before starting our descent.
Instead of backtracking along the south ridge, Zosia and I took a short
cut down Thirsty Mountain's eastern slope. The bushwhacking here
was much lighter than the south ridge, and we had no trouble dropping
down and regaining FT-436. Turning left, we easily hiked back to
the double trailhead.

A couple of spruce grouse chicks and the mother hen are
startled by intruders.
Without stopping at the double trailhead, Zosia and I continued eastward
along FT-436 to ascend Webb Mountain. The pleasant trail runs parallel to
the fire lookout tower access road (NF-7179F) and eventually joins it just below the
top. Disappointingly, far-reaching views from the fire lookout tower were
obscured by wildfire haze which was not unexpected. We were also joined
at the top by a couple of hikers from Red Deer, Alberta, and we had a
pleasant chat with them before settling down for a snack break.
For our return, Zosia and I simply walked down NF-7179F to
our car parked near the double trailhead. The ensuing long drive home was
thankfully uneventful and neatly wrapped up another exhausting but
memorable summer road trip.

Sonny and Zosia rejoice near the summit of Webb
Mountain (1830 metres). Visible at right is Thirsty Mountain (in
front of Boulder Mountain on the horizon).
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Total Distance: 9.1 kilometres
Round-Trip Time: 5 hours 5 minutes
Cumulative Elevation Gain: 299 metres
GPX Data |