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    Castle Lake Trail

    This reflects the 10Adventures difficulty rating for each route. We aim to keep ratings consistent across regions.
    This reflects the estimated time the majority of users will take on this trail. If you are slower, add time to the top-end figure. If you are fast, then you may complete this route faster than this time range.
    This reflects the return distance of this route as measured by the GPS file.
    16.4 km
    This reflects the total elevation gained throughout this route as measured by the GPS file. This includes all ascents and descents, and is higher than what is quoted in most route guides, which simply measure the distance between the starting-point and high-point of the route.
    691 m
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    Directions to Trailhead
    Castle Lake Trail

    The Castle Lake Trail is a picturesque adventure in the Shasta-Trinity National Forest. This revered route travels along the shoreline of the glacial basin up to an exposed divide that boasts uninterrupted vistas of Mount Shasta and the Klamath Mountains. Beckoning intrepid spirits year-round, this trek is a must-add to your hiking itinerary.

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    Route Description for Castle Lake Trail

    Immerse yourself in the beauty of the Shasta-Trinity National Forests along the Castle Lake Trail. This incredible adventure offers unrivaled vistas of the Klamath Mountains and Castle Crags. The exposed terrain warrants extreme weather, offering epic alpine views, so hikers are encouraged to dress in layers as insurance against changing conditions. We also urge you to wear sturdy, ankle bracing footwear due to the rocky and uneven terrain. Offering magical scenery year-round, winter adventures boast more challenging circumstances, so make sure you are properly equipped if you are daring enough to head out in the snowy season. Note sections of the path are only marked by cairns, so download the trail GPS prior to your trek to

    Get your heart rate up and indulge yourself in sweeping alpine views along this high-country adventure. Offering some of the best views in Northern California, the Castle Lake Hike is well worth a detour into the Castle Crags Wilderness. This trek is no walk in the park, reserved for experienced hikers and those seeking a challenge– though it is well worth the sweat! Head out in the morning for a more tranquil experience, and if you are an early riser, we encourage you to head out before dawn with a headlamp to watch the sunrise over the mountainous landscape. No matter the season or the time of day, the Castle Lake Trail will not disappoint.

    Your journey along the Castle Lake Trail begins from the trailhead off Castle Lake Road. Setting out from here, you will be guided east over a small delta which may require you to get your feet wet when the water is high. After crossing Castle Lake Creek, the path will redirect you south, along the eastern shore of Castle Lake. Admire the picture-perfect scene of the blue-hued waters bound by craggy granite walls adorned with lush conifers. Now climbing up the bluff via switchbacks, you will eventually reach a saddle. Here you will confront an intersection, veer left. Before continuing your trek, admire the overlook of Castle Lake.

    When you are ready, continue your hike—heading east along the Little Castle Lake/Mount Baldy Trail. Beyond this point, the trail is not well signposted, so adventurers will have to use the trail GPS or follow the rock cairns. From here, the path will gradually descend to Little Castle Lake. If the small lake is full, you will have to navigate another crossing over Ney Springs Creek. This is a great place to stop for a break and let your pup rehydrate before continuing on.

    Now climbing, you will summit a ridge that boasts views of Mount Shasta in the northeast and neighboring Klamath Mountains. Wandering east along the ridge through delicate flora and mixed conifers, you will also be rewarded with impressive sights of the Castle Crags in the south. Marvel at the topographic diversity that encompasses you and continue wandering towards Mount Bradley. You will ultimately reach your turnaround point at the intersection with Mount Bradley Road. From here, head back and retrace your footing along the path all the way back to the trailhead, marking the end of your adventure.

    Trail Highlights

    Castle Lake

    Castle Lake is a charming glacial pool nestled amongst the Klamath Mountains in Northern California. Encompassing roughly 50 acres, sitting at an elevation of 1,658 m, the lake drains into Castle Lake Creek, a tributary of the Lake Siskiyou reservoir. The chilly alpine waters beckon adventurers seeking refuge from the heat in the summer months. Water recreation and hiking, camping, and fishing are popular outdoor pursuits in the area. The next time you find yourself in the Shasta-Trinity National Forest, this beautiful lake is well worth a visit!

    Frequently Asked Questions

    How long is the Castle Lake Trail?

    The Castle Lake Trail is a 16.4 km out-and-back hike in the Shasta-Trinity National Forest.

    Can you swim in Castle Lake?

    Yes, Castle Lake offers great swimming opportunities in the warmer months.

    Where is Castle Lake in California?

    Castle Lake is a glacial basin in Siskiyou County in Northern California.

    Insider Hints for Castle Lake Trail

    • In the winter months, be sure to strap on a pair of microspikes or snowshoes to safely navigate the snow-capped, icy terrain
    • Wear a pair of sturdy footwear to safeguard your ankles on the uneven, rocky terrain
    • Dress in layers as insurance against changing conditions
    • Charge your camera, this route warrants countless photo opportunities
    • Maintain on the marked path at all times—the flora is delicate

    Getting to the Castle Lake Trail Trailhead

    Access the Castle Lake Hike from the trailhead at the end of Castle Lake Road.

    Route Information

    • Backcountry Campground


    • When to do


    • Pets allowed

      Yes - On Leash

    • Family friendly


    • Route Signage


    • Crowd Levels


    • Route Type

      Out and back

    Castle Lake Trail Elevation Graph

    Weather Forecast

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    Castle Lake Trail Reviews

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