| Totongna Nature Trail | Angeles National Forest | |
| Totongna Nature Trail affords the opportunity to walk over an earthquake fault and be able to explore several unusual communities found in the Crystal Lake area. |
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| Toyon Ridge Trail | | |
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| Trabuco Canyon Trail | | |
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| Trail Canyon Falls | Angeles National Forest | 1.5 |
| Trail Canyon Falls come into view about 1.5 miles from the parking area. Heavy rains can turn the normally placid stream into a respectable river, making crossings dangerous. |
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| Trail Gulch Lake | Klamath National Forest | 4.5 |
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| Trail of a Hundred Giants | Sequoia National Forest | 1.5 |
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| Trail of the Ancient Dwarfs | Stanislaus National Forest | 0.2 |
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| Trail of the Gargoyles | Stanislaus National Forest | 1.5 |
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| Trail of the Phoenix | San Bernardino National Forest | 0.5 |
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| Trail of the Sequoias | Sequoia Kings Canyon National Park | 7.4 |
| For more information on Trail of the Sequoias, see GORP's Sequoia and Kings Canyon National Parks feature. |
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| Trail to the Waterfall | Santa Monica Mountains National Recreation Area | |
| Begin along Big Sycamore Canyon Trail to reach this trail, which affords scenic waterfall views. |
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| Transition Walk Nature Trail | | |
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| Trappers Trail | | |
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| Traveler's Home Trail | Mendocino National Forest | 7.6 |
| Trail ends in the Wild and Scenic area of the Middle Fork Eel River. There are plenty of picnic spots. |
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| Travelers Home National Recreation Trail | Mendocino National Forest | 3.5 |
| This ride begins just past the sharp left bend in the road, where a gated private road joins the main road on the right. The first 1/2 mile of the ride is along the private road; the trail departs on the uphill (left) side of this road approximately 50... |
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| Trestle Loop Trail | Redwood National Park | 0.5 |
| This trail follows Mill Creek and offers a view of a historic railwood trestle from late 1800s along the way. |
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| Trippet Ranch Eagle Rock - Musch Ranch Loop | Topanga State Park | 5 |
| For more information on the Trippet Ranch Eagle Rock - Musch Ranch Loop, see GORP's Three Great Hikes Near Los Angeles feature. |
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| Troop 80 Trail | | |
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| Trout Creek Trail | Sequoia National Forest | 4.4 |
| This scenic trail starts at Corral Meadow and travels down the Trout Creek drainage to Boone Meadow Trail. Best suited for intermediate riders. |
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| Trout Gulch Trail | | |
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| Truckhaven Trail | | |
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| Tsurai Trail | | |
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| Tucker Trail | | |
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| Tule Divide Trail | | |
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| Tunnel II Trail | San Bernardino National Forest | 1 |
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