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Thunder Knob Trail

Intermediate Intermediate
 4.3 (26)
  1. Areas
  2. WA
  3. …North Cascades
  4. …North Cascades National Park
  5. Ross Lake National Recreation Area
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“This is a short trail through fir forests to a great viewpoint overlooking Diablo Lake with views of snowy mountains. ”

Joan Pendleton
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Map Key

1.9

Miles

3.0

KM

Point to Point

1,867' 569 m

High

1,222' 373 m

Low

668' 204 m

Up

26' 8 m

Down

7%

Avg Grade (4°)

27%

Max Grade (15°)

Dogs Leashed

Features Lake · River/Creek · Views

Family Friendly This is a short trail to great views that is probably best for older kids. Kids below about nine years old may find it too much of a struggle to be fun.

Description

There is a small Thunder Knob parking area at Diablo Lake on the north side of the highway. From here, you'll need to hike north through the campground to its far side to reach the Thunder Knob Trail.

The Thunder Knob Trail begins by almost immediately crossing Colonial Creek on a sturdy bridge. It then enters the fir forest and begins climbing gradually. The climb continues to the trail's end at the top of Thunder Knob. There are short sections of switchbacks in a few places on the climb, and occasional benches along the way to sit, rest, and enjoy the views.

As Thunder Knob Trail climbs, the views get better and better. One passes views of Diablo Lake and Thunder Creek Valley to the southeast, and Colonial Peak to the southwest, as the trail goes through thick fir forest. Eventually, the trees thin and get smaller as the trail nears the top of Thunder Knob, allowing more views in all directions.

From the top of Thunder Knob one can see turquoise Diablo Lake far below and snowy peaks in all directions. Diablo Lake is fed by Thunder Creek, with its glacier and snowmelt sources high in the mountains. More benches at the top of Thunder Knob give one a chance to linger, rest, and enjoy the views.

Contacts

Land Manager: NPS - Ross Lake National Recreation Area

Shared By:

Joan Pendleton
Full Details

Trail Ratings

  4.3 from 26 votes

#1

in Ross Lake National Recreation Area

#279

Overall
  4.3 from 26 votes
5 Star
50%
4 Star
35%
3 Star
12%
2 Star
4%
1 Star
0%
Trail Rankings

#1

in Ross Lake National Rec…

#19

in Washington

#279

Overall
3 Views Last Month
2,916 Since Nov 10, 2016
Intermediate Intermediate
4%
14%
79%
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Add a Photo

Photos

The rewarding view of Diablo Lake from the top!!!
Aug 28, 2016 near Diablo, WA
Colonial Peak looking south-southwest from the Thunder Knob Trail
Jul 26, 2017 near Diablo, WA
Davis Peak, MacMillan Spires, distant glacier, and nearby shoulder of Sourdough Mountain (left to right) rise above Diablo Lake, looking northwest from Thunder Knob
Jul 26, 2017 near Diablo, WA
Colonial Creek is crossed at the start of the Thunder Knob Trail. Colonial Creek's source is Colonial Glacier, high on Colonial Peak.
Jul 26, 2017 near Diablo, WA
The Thunder Knob Trail wanders through the fir forests of the North Cascades on a summer day.
Jul 26, 2017 near Diablo, WA
Diablo Lake below, looking east-northeast from Thunder Knob
Jul 26, 2017 near Diablo, WA

0 Comments

Weather

Current Trail Conditions

All Clear 17 days ago
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Check-Ins

Sep 18, 2023
Sara Becker
Not bad few switch backs but good trail. Good view from the top 3.9mi — 1h 30m
Jul 28, 2023
Clara Lee
Jul 17, 2023
Lou Ann Camper
Jul 8, 2023
Hannah Stewart
Jul 3, 2023
Connor Williams
good views, easy 1.9mi
Jun 13, 2023
Matthew Hamilton
Jan 22, 2023
Alex Moldovan
bridge was out. had to climb over rocks and trees to cross the river. 3.6mi — 1h 34m
Oct 11, 2022
FARAZ DURRANI

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