| Summit - Bucks Creek Loop Trail | Plumas National Forest | 9 |
| Summit trailhead starts at Bucks Summit and continues 2 miles through meadows and forested area. When the trail reaches the pavement turn right and take the Bucks Creek trail 1.8 miles back to Bucks Lake Road and continue 1/4 mile to Bucks Summit. |
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| Summit Creek Trail | Lassen Volcanic National Park | |
| The Summit Creek Trail leads one and a half miles downstream to join the Kings Creek Trail. This is an easy hike with a 525-foot climb on the return. |
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| Summit Lake Trail | Tahoe National Forest | |
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| Summit Lake Trail Donner Summit Area | Tahoe National Forest | 2 |
| For the first mile this hike follows the Pacific Crest Access Trail (15E18) in an easterly direction and then follows the Pacific Crest Trail for another mile in a northerly direction, passing through a tunnel under I-80. Shortly after the underpass th... |
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| Summit Trail | Sequoia National Forest | 11.3 |
| Summit Trail runs north and south along the Western Divide Highway, crossing Mountaineer Creek and Pecks Canyon Creek. |
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| Summit Trail | Modoc National Forest | 22.4 |
| Relatively flat, open large meadows to the west. Water is available, but not abundant as Owl Creek Trail. There is not much water from Eagle Peak to Patterson Lake. The trip from Pepperdine to Patterson Lake takes 4-5 hours. |
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| Summit Valley Trail | Six Rivers National Forest | 8.1 |
| This moderate to difficult trail travels through mountain meadows filled with wildflowers in the late spring. The trailhead is located about two hours from Crescent City off South Fork Road. |
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| Summit-Bucks Creek Loop Trail | Plumas National Forest | 9 |
| Summit trailhead starts at Bucks Summit and continues 2 miles through meadows and forested area. When the trail reached the pavement turn right and take the Bucks Creek trail 1.8 miles back to Bucks Lake Road and continue 1/4 mile to Bucks Summit. |
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| Sun Rock Trail | | |
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| Sun Trail | | |
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| Suncrest Truck Trail | | |
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| Sunday Peak Trail | Sequoia National Forest | 1.7 |
| The Sunday Peak Trail climbs through mixed conifer forest on a moderate grade to the summit of Sunday Peak. Excellent views of the Kern Valley, the Plateau and high Sierra peaks may be seen on clear days. |
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| Sunflower Trail | | |
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| Sunnyside Campground to Yosemite Falls (Hike 68) | Yosemite National Park | 6.6 |
| From the northwest corner of the parking lot for Sunnyside Walk-In Camp ground, take a trail 120 yards northwest up to the north-side Valley floor trail (Hike 63). By walking west on it about 25 yards, you reach the start of the Yosemite Falls trail. W... |
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| Sunrise Lakes Trail | Yosemite National Park | |
| This trail leads three and a half miles from Tenaya Trailhead to Sunrise Lakes. It's an easy trek through some amazing alpine terrain. |
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| Sunrise Trail | Yosemite National Park | 16.8 |
| For more information on the Sunrise Trail, see GORP's Tioga Road to Sunrise Camp feature. |
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| Sunset Nature Trail | Mendocino National Forest | |
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| Sunset Rock | Sequoia Kings Canyon National Park | 2 |
| For more information on Sunset Rock, see GORP's Sequoia and Kings Canyon National Parks feature. |
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| Sunset Trail | Sequoia and Kings Canyon National Park | 6 |
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| Sunset Trail | Cleveland National Forest | 4.6 |
| Sunset Trail offers hikers an enjoyable 4.6 mile trek through scenic Forest meadowland. |
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