RV Parks In Castle Rock, Washington

The best-known park is Toutle River RV Resort, a large riverside resort with full hookups, 30 and 50-amp service, and oversized pull-through pads that handle rigs up to 100 feet, all a couple of minutes off I-5. Mt. St. Helens RV Park is the quieter year-round pick, a small full-hookup park two miles off the interstate on Schaffran Road with a dump station, showers, and WiFi, close to the Silver Lake visitor center. Silver Cove RV Resort adds another full-hookup option toward the mountain. For a public site, Seaquest State Park offers forested camping across SR-504 from the visitor center with a limited number of full-hookup sites in its T-loop. Between them you can pick a big resort or a shaded state park.

Yes. The private parks are built around full hookups: Toutle River RV Resort offers full hookups with 30 and 50-amp service, water, and sewer on oversized sites, and Mt. St. Helens RV Park and Silver Cove RV Resort both provide full-hookup sites as well. Seaquest State Park, the public option, has a smaller number of full-hookup sites in its T-loop plus partial-hookup (electric and water) sites and standard sites with a shared dump station. So if full hookups are a must, the private resorts have the most availability, while Seaquest can deliver full hookups too if you book one of its limited T-loop sites early. Either way you can get water, electric, and sewer at your site in Castle Rock.

It depends on public versus private. Seaquest State Park is the budget choice, with standard and partial-hookup sites at low Washington State Parks rates and only a handful of pricier full-hookup sites, plus a small out-of-state surcharge. The private resorts run higher: Mt. St. Helens RV Park and Silver Cove sit in the moderate range for a nightly full-hookup site, while Toutle River RV Resort trends toward the top end because of its oversized riverside pads and resort amenities, especially on summer weekends. Rates soften in the wet shoulder and winter months at the year-round private parks, and weekly or monthly discounts lower the effective nightly cost for longer stays. You can camp cheaply in the forest or pay premium for a full-hookup pad by the interstate.

For summer, reserve early. Seaquest State Park has only 15 full-hookup T-loop sites, and they book out first through the Washington State Parks reservation system, so grab one months ahead if you want full hookups at the state park. The private resorts, Toutle River, Mt. St. Helens RV Park, and Silver Cove, also fill on summer weekends when Mount St. Helens sees its heaviest traffic, so a week or more of lead time is wise in July and August. Book direct with the private parks. In the wet shoulder seasons and winter you can often find a site with little notice at the year-round private parks, though the state park sees far fewer campers. Weekdays are always easier than weekends.

July through September is the sweet spot. Those are the dry months in southwest Washington, with warm valley days, long daylight, and the best odds of clear views into the crater from Johnston Ridge. Late spring is green but rainy, and snow can linger on the upper mountain into July even when Castle Rock is mild near sea level. Fall cools and grows wetter as the season turns, but it thins the crowds and brings color to the river valley. Winter is mild and rainy in town, though the upper SR-504 road and Windy Ridge close for the season. For the classic mountain trip, target midsummer and pick a clear morning for the drive to the top.

Yes, this is good big-rig country. Toutle River RV Resort is one of the most big-rig-friendly parks in the region, with oversized full-hookup pull-through pads that handle rigs up to 100 feet. Mt. St. Helens RV Park accommodates rigs up to 64 feet with full hookups, and Silver Cove offers spacious sites as well. All three sit within a few miles of I-5 Exit 49 on flat, easy roads, so the approach is simple for a long Class A or fifth wheel. Seaquest State Park is more limited, with a maximum site length around 50 feet and limited pull-through availability, so reserve early there. The one road to avoid in a big rig is the upper SR-504 to Johnston Ridge; take the tow vehicle up instead.

Yes, Seaquest State Park is right in the neighborhood. It is a forested 475-acre Washington State Park sitting directly across the Spirit Lake Memorial Highway from the Mount St. Helens Visitor Center, connected to it and to Silver Lake by a pedestrian tunnel. The campground has 15 full-hookup sites in the T-loop, 18 partial-hookup sites with electric and water, and 52 standard sites, plus a dump station and showers. The maximum site length runs about 50 feet with limited long-rig availability, so book early in summer through the Washington State Parks reservation system. It is the cheapest and most scenic public base for exploring the volcano, with trails right out of the campground.

It is easy. I-5 runs right past Castle Rock at Exit 49, the main north-south interstate linking Portland, Oregon about an hour south with Olympia and Seattle to the north, and it is fully big-rig friendly. The private resorts and Seaquest State Park all sit within a few miles of the interchange on flat, well-signed roads, so the approach is straightforward for any size rig. Fuel and propane are available in Castle Rock, with more services in Longview and Kelso just south on I-5. The only road that demands care is SR-504 up to the observatory, which is winding and climbs to 4,300 feet; leave the RV at camp and drive that in your tow vehicle. Otherwise, arriving here is about as simple as Northwest RV travel gets.

Generally yes. Toutle River RV Resort, Mt. St. Helens RV Park, and Silver Cove all welcome pets, as most private RV resorts do, and Seaquest State Park allows leashed pets under standard Washington State Parks rules. Policies on the number of pets, breeds, and designated pet areas vary by park, so confirm the specifics when you book, especially at the larger resorts. The forest trails at Seaquest and the marsh loop at the Silver Lake visitor center give dogs good places to stretch their legs, though pets are restricted on some national monument trails higher up SR-504, so check before you go. As always, keep pets leashed in the campground, carry vaccination records, and clean up after them.

The whole draw is Mount St. Helens. Start at the Mount St. Helens Visitor Center on Silver Lake, five miles east on SR-504, with its step-in volcano model, theater programs, and a mile-long marsh trail. Drive the Spirit Lake Memorial Highway up to Coldwater Lake for boating and picnicking, walk the Hummocks Trail through the 1980 debris field, and continue to Johnston Ridge Observatory for the head-on crater view. Silver Lake itself is great for waterfowl watching and the classic mountain photo. Back near town, the Cowlitz and Toutle rivers offer fishing, and Longview and Kelso add restaurants and shopping a few miles south. It is an easy base for mixing volcano viewpoints, forest trails, and river time.

Yes, and Seaquest State Park is as close as it gets. The state park campground sits directly across SR-504 from the Mount St. Helens Visitor Center at Silver Lake, linked by a pedestrian tunnel, so you can walk from your site to the exhibits and the lake without driving. Seaquest offers full-hookup, partial-hookup, and standard sites in a forested setting five miles east of I-5. If you prefer full hookups with more space, Silver Cove RV Resort and Mt. St. Helens RV Park are also just a few minutes from the visitor center, while Toutle River RV Resort is a short drive back toward the interstate. Any of them puts the visitor center and the Spirit Lake Memorial Highway within an easy reach.

The private ones are. Toutle River RV Resort, Mt. St. Helens RV Park, and Silver Cove RV Resort all operate year-round, and winter near sea level at Castle Rock is mild and rainy rather than snowy, so full hookups keep working with basic freeze precautions. Seaquest State Park also stays open year-round for camping, though it is much quieter in the cold months. What closes in winter is the upper Spirit Lake Memorial Highway and Windy Ridge, so the high viewpoints are off the table until spring, but the Silver Lake visitor center and the lower trails remain accessible. Off-season rates are lower and sites are easy to get, making winter a fine time for a quiet, rainy Pacific Northwest stay if you do not need the summit views.

It is an excellent one. Castle Rock sits right on I-5 with the Spirit Lake Memorial Highway climbing east into the Mount St. Helens National Volcanic Monument, so you get interstate convenience and dramatic volcano country from the same campsite. From here you can day-trip up SR-504 to the visitor centers, lakes, and Johnston Ridge, fish the Cowlitz and Toutle rivers, or run south to Longview, Kelso, and eventually Portland for city amenities. The mix of big-rig-friendly full-hookup resorts and a forested state park means you can travel comfortably whatever your rig. For RVers who want Mount St. Helens without a hard drive to reach a campsite, Castle Rock is an easy recommendation and a natural stop on any I-5 Northwest tour.

The best-known park is Toutle River RV Resort, a large riverside resort with full hookups, 30 and 50-amp service, and oversized pull-through pads that handle rigs up to 100 feet, all a couple of minutes off I-5. Mt. St. Helens RV Park is the quieter year-round pick, a small full-hookup park two miles off the interstate on Schaffran Road with a dump station, showers, and WiFi, close to the Silver Lake visitor center. Silver Cove RV Resort adds another full-hookup option toward the mountain. For a public site, Seaquest State Park offers forested camping across SR-504 from the visitor center with a limited number of full-hookup sites in its T-loop. Between them you can pick a big resort or a shaded state park.

Yes. The private parks are built around full hookups: Toutle River RV Resort offers full hookups with 30 and 50-amp service, water, and sewer on oversized sites, and Mt. St. Helens RV Park and Silver Cove RV Resort both provide full-hookup sites as well. Seaquest State Park, the public option, has a smaller number of full-hookup sites in its T-loop plus partial-hookup (electric and water) sites and standard sites with a shared dump station. So if full hookups are a must, the private resorts have the most availability, while Seaquest can deliver full hookups too if you book one of its limited T-loop sites early. Either way you can get water, electric, and sewer at your site in Castle Rock.

It depends on public versus private. Seaquest State Park is the budget choice, with standard and partial-hookup sites at low Washington State Parks rates and only a handful of pricier full-hookup sites, plus a small out-of-state surcharge. The private resorts run higher: Mt. St. Helens RV Park and Silver Cove sit in the moderate range for a nightly full-hookup site, while Toutle River RV Resort trends toward the top end because of its oversized riverside pads and resort amenities, especially on summer weekends. Rates soften in the wet shoulder and winter months at the year-round private parks, and weekly or monthly discounts lower the effective nightly cost for longer stays. You can camp cheaply in the forest or pay premium for a full-hookup pad by the interstate.

For summer, reserve early. Seaquest State Park has only 15 full-hookup T-loop sites, and they book out first through the Washington State Parks reservation system, so grab one months ahead if you want full hookups at the state park. The private resorts, Toutle River, Mt. St. Helens RV Park, and Silver Cove, also fill on summer weekends when Mount St. Helens sees its heaviest traffic, so a week or more of lead time is wise in July and August. Book direct with the private parks. In the wet shoulder seasons and winter you can often find a site with little notice at the year-round private parks, though the state park sees far fewer campers. Weekdays are always easier than weekends.

July through September is the sweet spot. Those are the dry months in southwest Washington, with warm valley days, long daylight, and the best odds of clear views into the crater from Johnston Ridge. Late spring is green but rainy, and snow can linger on the upper mountain into July even when Castle Rock is mild near sea level. Fall cools and grows wetter as the season turns, but it thins the crowds and brings color to the river valley. Winter is mild and rainy in town, though the upper SR-504 road and Windy Ridge close for the season. For the classic mountain trip, target midsummer and pick a clear morning for the drive to the top.

Yes, this is good big-rig country. Toutle River RV Resort is one of the most big-rig-friendly parks in the region, with oversized full-hookup pull-through pads that handle rigs up to 100 feet. Mt. St. Helens RV Park accommodates rigs up to 64 feet with full hookups, and Silver Cove offers spacious sites as well. All three sit within a few miles of I-5 Exit 49 on flat, easy roads, so the approach is simple for a long Class A or fifth wheel. Seaquest State Park is more limited, with a maximum site length around 50 feet and limited pull-through availability, so reserve early there. The one road to avoid in a big rig is the upper SR-504 to Johnston Ridge; take the tow vehicle up instead.

Yes, Seaquest State Park is right in the neighborhood. It is a forested 475-acre Washington State Park sitting directly across the Spirit Lake Memorial Highway from the Mount St. Helens Visitor Center, connected to it and to Silver Lake by a pedestrian tunnel. The campground has 15 full-hookup sites in the T-loop, 18 partial-hookup sites with electric and water, and 52 standard sites, plus a dump station and showers. The maximum site length runs about 50 feet with limited long-rig availability, so book early in summer through the Washington State Parks reservation system. It is the cheapest and most scenic public base for exploring the volcano, with trails right out of the campground.

It is easy. I-5 runs right past Castle Rock at Exit 49, the main north-south interstate linking Portland, Oregon about an hour south with Olympia and Seattle to the north, and it is fully big-rig friendly. The private resorts and Seaquest State Park all sit within a few miles of the interchange on flat, well-signed roads, so the approach is straightforward for any size rig. Fuel and propane are available in Castle Rock, with more services in Longview and Kelso just south on I-5. The only road that demands care is SR-504 up to the observatory, which is winding and climbs to 4,300 feet; leave the RV at camp and drive that in your tow vehicle. Otherwise, arriving here is about as simple as Northwest RV travel gets.

Generally yes. Toutle River RV Resort, Mt. St. Helens RV Park, and Silver Cove all welcome pets, as most private RV resorts do, and Seaquest State Park allows leashed pets under standard Washington State Parks rules. Policies on the number of pets, breeds, and designated pet areas vary by park, so confirm the specifics when you book, especially at the larger resorts. The forest trails at Seaquest and the marsh loop at the Silver Lake visitor center give dogs good places to stretch their legs, though pets are restricted on some national monument trails higher up SR-504, so check before you go. As always, keep pets leashed in the campground, carry vaccination records, and clean up after them.

The whole draw is Mount St. Helens. Start at the Mount St. Helens Visitor Center on Silver Lake, five miles east on SR-504, with its step-in volcano model, theater programs, and a mile-long marsh trail. Drive the Spirit Lake Memorial Highway up to Coldwater Lake for boating and picnicking, walk the Hummocks Trail through the 1980 debris field, and continue to Johnston Ridge Observatory for the head-on crater view. Silver Lake itself is great for waterfowl watching and the classic mountain photo. Back near town, the Cowlitz and Toutle rivers offer fishing, and Longview and Kelso add restaurants and shopping a few miles south. It is an easy base for mixing volcano viewpoints, forest trails, and river time.

Yes, and Seaquest State Park is as close as it gets. The state park campground sits directly across SR-504 from the Mount St. Helens Visitor Center at Silver Lake, linked by a pedestrian tunnel, so you can walk from your site to the exhibits and the lake without driving. Seaquest offers full-hookup, partial-hookup, and standard sites in a forested setting five miles east of I-5. If you prefer full hookups with more space, Silver Cove RV Resort and Mt. St. Helens RV Park are also just a few minutes from the visitor center, while Toutle River RV Resort is a short drive back toward the interstate. Any of them puts the visitor center and the Spirit Lake Memorial Highway within an easy reach.

The private ones are. Toutle River RV Resort, Mt. St. Helens RV Park, and Silver Cove RV Resort all operate year-round, and winter near sea level at Castle Rock is mild and rainy rather than snowy, so full hookups keep working with basic freeze precautions. Seaquest State Park also stays open year-round for camping, though it is much quieter in the cold months. What closes in winter is the upper Spirit Lake Memorial Highway and Windy Ridge, so the high viewpoints are off the table until spring, but the Silver Lake visitor center and the lower trails remain accessible. Off-season rates are lower and sites are easy to get, making winter a fine time for a quiet, rainy Pacific Northwest stay if you do not need the summit views.

It is an excellent one. Castle Rock sits right on I-5 with the Spirit Lake Memorial Highway climbing east into the Mount St. Helens National Volcanic Monument, so you get interstate convenience and dramatic volcano country from the same campsite. From here you can day-trip up SR-504 to the visitor centers, lakes, and Johnston Ridge, fish the Cowlitz and Toutle rivers, or run south to Longview, Kelso, and eventually Portland for city amenities. The mix of big-rig-friendly full-hookup resorts and a forested state park means you can travel comfortably whatever your rig. For RVers who want Mount St. Helens without a hard drive to reach a campsite, Castle Rock is an easy recommendation and a natural stop on any I-5 Northwest tour.

The highest-rated station is Brookhollow RV Park with a rating of 3.9/5 stars.

Yes — there are free RV waste disposal options available near Castle Rock.