| June Lake Trail | Gifford Pinchot National Forest | 1.4 |
| This trail is a gentle climb through a young fir forest following along the course of June Creek. From there, it's a steep ascent to the junction with the Loowit Trail system. |
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| Jungle Hill Trail | Colville National Forest | 2.5 |
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| Juniper Ridge Trail | Gifford Pinchot National Forest | 11.6 |
| From the trailhead on Road 2904, the trail climbs the first 2 miles through small conifers with views between trees. The trail follows the ridgeline for 4.5 miles to the base of Sunrise Peak, then drops down to a meadow and pond, before climbing back t... |
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| Jupiter Ridge Trail | Olympic National Forest | 7.2 |
| The lower portion of this trail is excellent for an early season hike (after May 1st when the gate opens) due to the early snow melt on the ridge line. This trail offers opportunities for day hiking, photographing expansive scenic views and wildflowers... |
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| Kachess Ridge Trail | | |
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| Kalama River Trail | | |
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| Kaner Flat Trail | | |
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| Keenan Meadows Trail | | |
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| Keenes Trail | Gifford Pinchot National Forest | 1.99 |
| Keenes Trail and the nearby horsecamp were named after Keenes Meade, a Forest Service mule packer. The trail begins in the Keenes Horse Camp and provides access to Trails #115, #116 and Horseshoe Lake. Horses and mules now share the heavily used route ... |
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| Kelly Butte Trail | | |
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| Kennedy Ridge Trail | Mt. Baker-Snoqualmie National Forest | 2 |
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| Kettle Crest #13 N Trail | Colville National Forest | 30.24 |
| The Kettle Crest Trail, with its open grassy meadows and rocky talus slopes, is one of the more popular trails on the Forest for hiking, backpacking, and horseback riding. |
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| Kettle Crest #13 S Trail | Colville National Forest | 13.31 |
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| Kettle Crest Trail | Colville National Forest | 13.31 |
| The 1988 White Mt. Fire burnt 20,000 acres on either side of the trail. Green oasis left by the fire stand out in the blackened landscape. Water can be found on and adjacent to trails. There are many camping opportunities for dispersed camping along th... |
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| Kettle Crest Trail #13 North | Colville National Forest | 30.24 |
| The majority of the trail is located within the Kettle Range Limited Access Areas. Attractions along the trail include: open grassy meadows where a variety of wild flowers grow, rock outcrops, talus slopes that provide opportunities for cross- country ... |
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| Killen Creek Trail | Gifford Pinchot National Forest | 3.1 |
| The Killen Creek trail is 3.1 miles long and located in the Mt. Adams Wilderness. |
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| Kincaid Trail | Gifford Pinchot National Forest | 8.8 |
| Located on Carlton Ridge, the Kincaid Trail begins on Road 4510 just past the Cowlitz Horse Trail #44A trailhead, descends, then begins to climb steeply. The trail reaches the top of the ridge near Log Springs, crosses the summit burn and enters the Wi... |
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| Kincaid Trail | | |
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| Klapatche Park | Mount Rainier National Park | |
| This trail leads 18.5 miles round trip from Westside Road to Klapatche Park Camp. En route are several primitive camping areas. |
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| Klickitat Loop Trail | Gifford Pinchot National Forest | 27 |
| Klickitat Loop Trail #7A provides users with a loop trail mostly outside of the Wilderness Area. Sections of this trail were constructed and are maintained by members of the Backcountry Horsemen of Washington. Sections of this trail use closed logging ... |
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| Klickitat Trail | Gifford Pinchot National Forest | 17 |
| Expect patches of snow as late as August. The west end of the lightly used trail begins on Road 5508.024 in the Randle District and the east end is on Road 22 in the Packwood District. Much of the trail corresponds with an original Indian trail which e... |
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| Klone Peak Trail | Wenatchee National Forest | 0.2 |
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| Kraus Ridge Trail | Gifford Pinchot National Forest | 4.4 |
| Beginning on Road 2306, this trail follows Kraus Ridge through dense old growth. The trail crosses Road 2506 and ends on Road 2506.037. The trail was named after William Kraus, a prospector and homesteader in the area before 1905. It is usually a good ... |
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| La Crosse Pass | Olympic National Park | |
| The La Crosse Pass Trail leads southward from the West Fork Dosewallips River to the Duckabush River. It reaches a high point of 5,566 feet on La Crosse Pass, which provides sweeping views of the surrounding terrain. |
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| Lake Angeles | Olympic National Park | |
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