Castle Rock, WA Trails and Parks

Castle Rock has 20 trails in the vicinity, including 15 hiking trails and 3 for birding. These trails range from 0.3 to 52 miles in length. The most popular trails are Merrill Lake Campground, Cowlitz River—Castle Rock to Longview and Spirit Lake Memorial Highway to Mount St. Helens. Trails.com member Danny M. recently completed Spirit Lake Memorial Highway to Mount St. Helens.
  • Spirit Lake Memorial Highway to Mount St. HelensView Trail Details

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    Castle Rock, WA

    • Scenic Drives  
    •  52 miles
    •  Guide

    This 52-mile drive (each way) to Mount St. Helens is like a trip to the moon, thanks to the 1980 eruption of the volcano. The effects of its ...

  • Mount Saint Helens National Volcanic MonumentView Trail Details

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    Castle Rock, WA

    • Birding  
    •  Guide

    When it comes to birding new habitat, no other place in Washington offers the degree of new opportunities found along the Birth of a Lake Trail ...

  • Truman Trail— Pumice PlainView Trail Details

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    Castle Rock, WA

    • Hiking  
    •  10 hours
    •  10.4 miles
    •  Guide

    Hike across the lonely Pumice Plain deep into the heart of the blast zone. Once desolate, the plain now teems with wildflowers, willows, ...

  • Harry’s RidgeView Trail Details

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    Castle Rock, WA

    • Hiking  
    •  8 hours
    •  8.2 miles
    •  Guide

    Harry’s Ridge hovers high above Spirit Lake, and the spirit of Harry Truman, a curmudgeonly lodge keeper, rests in this wickedly beautiful area ...

  • Eruption TrailView Trail Details

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    Castle Rock, WA

    • Hiking  
    •  30 minutes
    •  0.6 miles
    •  Guide

    The Eruption Trail overflows with alpine scenery, flower-gazing opportunities, natural and historical interpretation, and stunning ...

  • Johnston RidgeView Trail Details

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    Castle Rock, WA

    • Hiking  
    •  8-9 hours
    •  9.0 miles
    •  Guide

    Forget driving to the Johnston Ridge Observatory when you can hike to it instead! Follow part of the Boundary Trail through wildflower-shrouded ...

  • The HummocksView Trail Details

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    Castle Rock, WA

    • Hiking  
    •  2-2.5 hours
    •  2.5 miles
    •  Guide

    Stroll through a series of steep-sided hills formed by debris avalanche deposits from the 1980 eruption. The Hummocks is a fascinating landscape ...

  • South Coldwater RidgeView Trail Details

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    Castle Rock, WA

    • Hiking  
    •  6-7 hours
    •  6.8 miles
    •  Guide

    Hike along a ridge above the sparkling waters of Coldwater Lake admiring Nature’s reclamation of a ravaged landscape. Marvel at the deciduous ...

  • Coldwater LakeView Trail Details

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    Castle Rock, WA

    • Hiking  
    •  8-9 hours
    •  9.0 miles
    •  Guide

    From Castle Rock (exit 49 on I-5), follow State Route 504 east for 45 miles, turning left into the Coldwater Lake Recreation Area. Continue 0.4 ...

  • Birth of a Lake TrailView Trail Details

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    Castle Rock, WA

    • Hiking  
    •  30 minutes
    •  0.5 miles
    •  Guide

    Follow a delightful nature trail along Coldwater Lake’s marshy outlet to a handsome dock protruding into the four-mile-long lake. On this scenic ...

  • Elk Bench TrailView Trail Details

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    Castle Rock, WA

    • Hiking  
    •  1.5-2 hours
    •  2.0 miles
    •  Guide

    It’s a reverse climb to Coldwater Lake via this lightly traveled (by humans, not elk) trail. From the Mount St. Helens Science and Learning Center ...

  • Winds of Change TrailView Trail Details

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    Castle Rock, WA

    • Hiking  
    •  10-20 minutes
    •  0.3 miles
    •  Guide

    While it’s only a third of a mile long, the Winds of Change Trail is one of the most scenic interpretive trails in the state. Mosey high above ...

  • Forest Learning TrailView Trail Details

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    Castle Rock, WA

    • Hiking  
    •  40-60 minutes
    •  0.8 miles
    •  Guide

    Don’t overlook this trail and learning center on one of the best overlooks along the Spirit Lake Highway (SR 504). Learn about forest and wildlife ...

  • Sediment Retention Dam TrailView Trail Details

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    Castle Rock, WA

    •  1-1.5 hours
    •  1.4 miles
    •  Guide

    Walk through a lush, mossy forest to a massive earthen dam built to prevent downriver flooding. Then walk upon the 184-foot-high dam, enjoying ...

  • Seaquest State Park— Forest LoopView Trail Details

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    Castle Rock, WA

    •  1.5-2 hours
    •  2.0 miles
    •  Guide

    Wander the wooded periphery of one of the best base campgrounds for exploring the north side of the Monument.

  • Seaquest State Park- Silver LakeView Trail Details

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    Castle Rock, WA

    •  30-60 minutes
    •  1.0 miles
    •  Guide

    A sliver of its former self, seven-foot-deep Silver Lake is gradually receding. But the lake’s loss is wetlands’ gain—and a boon for bird-watchers, ...

  • Cowlitz Riverfront EastView Trail Details

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    Castle Rock, WA

    • Hiking  
    •  2.5- 3 hours
    •  3.6 miles
    •  Guide

    Amble alongside the Cowlitz River on an award-winning community trail that belies the town’s size.

  • Merrill Lake CampgroundView Trail Details

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    Castle Rock, WA

    • Campgrounds  
    •  Guide

    In May 1980 Mount St. Helens forever altered the landscape for miles around when it erupted and caused the worst natural disaster that western ...

  • The Big Bang: Mount St. Helens Volcano Eruption AnniversaryView Trail Details

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    Castle Rock, WA

    • Nature Trips  
    •  Up to a weekend
    •  Guide

    Treat yourself to a weekend at Mount St. Helens National Volcanic Monument on the anniversary of its most recent eruption, May 18, 1980. Stop ...

  • Cowlitz River—Castle Rock to LongviewView Trail Details

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    Castle Rock, WA

    • Flatwater Kayaking & Canoeing  
    •  4 to 5 hours
    •  16 miles
    •  Guide

    This trip follows the Cowlitz River on the last leg of its journey to the Columbia. The trip starts in the town of Castle Rock and ends near ...