Explore Mt. Saint Helens Caves!

The Oregon Grotto, in conjunction with the Cascade Grotto and the Willamette Valley Grotto, is excited to host the 2024 NSS Western Regional from Sept. 19th to 22nd!

The event will take place in the Town of Cougar, WA, only 1 hour from Portland, at the Cougar RV Park and Campground only minutes away from the lava flows on Mt St Helen’s southern slopes.

There are a number of food options in Cougar and additional options are only 30 minutes away in Woodland, WA as well.

While known mostly for the 1980 eruption, Mt Saint Helens is host to a very diverse cave selection. Not only are there amazing lava tubes, but it also holds several of the world's longest erosional caves. On top of that, the area contains hundreds of tree molds and tree mold cave complexes, as well as deep vertical crack caves that require expert rope skills. Be sure to bring your vertical gear if want to access any vertical caves!

The area's lava field is surrounded by a lush, old growth rain forest, and makes accessing the caves even more interesting.

Since the last regional in the area, dozens of new, significant caves have been discovered, and offer even more unique experiences to the already great inventory of caves.

For more information about the Western Regional and the Mt. Saint Helens caves please visit the Oregon Grotto website.

Location Information

  • Cougar RV Park and Campground
  • 16730 Lewis River Road, Cougar, WA, 98616 US
  • Google, Bing, MapQuest

Register Today!

The option to bring your vehicle is sold out! Please inquire about rideshares or a waitlist!

Because of limited parking in the event campground we are selling only 50 tickets that include parking to encourage carpooling. For example, if you are traveling in a group of two, one of you needs to a ticket for camping and parking ($65) and the other person only needs a ticket for camping ($50). If parking sells out, independently reserving a site in the adjacent Lone Fir Inn is an option. Children 16 and under are free and do not need a ticket or to register.

If you are registering more than one guest please first fill out the registration field for yourself. You will be able to add more registrants before submitting your payment.

If you need to cancel your registration there will be a $5 cancellation fee.

  • SOLD OUT! Please select a carpool or independent lodging option!!! Entrance to the event, camp, and one vehicle in our group campground.

  • Entrance to the event and camping space in the group campground, but no vehicle entrance to group campground.

  • Entrance to the event, but no camping or vehicle entrance to the campground. Alternate lodging options include the adjacent Lone Fir Resort or dispersed camping in the national forest. Parking options can be found on the Oregon Grotto website. Or choose this option for a 3- or 4-Day pass.

  • Entrance to the event on a single day. Day parking options can be found on the Oregon Grotto Website.

  • Entrance to the event for two days. Day parking options can be found on the Oregon Grotto Website. For 3 or more days please choose the No Camping option.

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