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Rattlesnake Mountain Trail

 4.2 (15)

10.2 Miles 16.5 Kilometers



2,675' 815 m


-2,796' -852 m



Avg Grade (6°)


Max Grade (20°)

3,413' 1,040 m


952' 290 m


Shared By Eric Ashley


All Clear 56 days ago
Dry: Only one small tree down across the trail which is easily passable. Overall the trail is in great shape. History

Getting forecast...

A moderate run along the ridge of Rattlesnake Mountain with great views of the Cascades.

Eric Ashley

Dogs Leashed

Features Views · Wildlife

The three ledges along this trail have lots of exposure and care should be taken, especially with children or dogs. Parking lots on either end of this run require the use of a Discover Pass.

Runner Notes

Steady climbs will leave your legs burning, but the trail is in good shape and the views are excellent. Expect a steeper and more technical descent at the end with lots of people to keep you company.


The Rattlesnake Mountain Trail can be used in either direct and is best enjoyed with a retrieval vehicle waiting at the destination. Beginning from the Snoqualmie Point Park, the trail heads up the slope and into the trees, making a number of road crossing in the first couple of miles. Stan's Overlook is a worthwhile diversion that can be reached quickly from the trail. The towering slopes on the other side of I90 are quite striking.

From there, the trail continues switchbacking along the ridge. Occasionally, the route will make use of old roadways, but thorough signage makes the navigating straightforward. Just over four miles in, the trail comes to Grand Prospect Viewpoint. Take a moment to rest on the conveniently placed benches as you soak in the sights. If running as an out-and-back, this is a good turn around spot.

The climbing isn't done, but the going remains easy over the next few miles as the trail follows the rolling elevation of the ridge. The last few miles of the trail descends along a series of switchbacks through a young forest. The big highlights will be three ledges that provide great views. The lowest is Rattlesnake Ledge and it's a very popular destination, so expect lots of company here and as you continue down the trail to where it ends on a service road near Rattlesnake Lake.


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Your Check-Ins


Sep 17, 2018
Vikram Sahney
Ran the full ridge out and back. Trail is in great shape. Almost no people until you get to Rattlesnake Ledges area. 20.4mi — 4h 00m
Aug 13, 2018
Geoff Pleiss
Jul 1, 2018
Out and back 20mi
Jun 24, 2018
Cole DeForest
Jun 23, 2018
Evan Griffith
Jun 16, 2018
Anson Fatland
Great trail. Well maintained, easy to follow. Crowded at the east end around the lake but two miles up the trail the crowds are gone. 20mi — 4h 45m
Apr 16, 2018
Mike S
Ran from Rattlesnake Lake up to the first gate and back, encountered a good bit of snow near the top of my run, along with areas of mud. 8mi — 1h 53m
Mar 11, 2018
Josh Stuart
Lots of snow, mostly compact.

Trail Ratings

  4.2 from 15 votes


  4.2 from 15 votes
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