Weddings

Castle Rock, WA Outdoor Wedding Venue with Mt. Rainier Views

There’s a reason couples search for an outdoor wedding venue in the Pacific Northwest — nothing else quite captures the feeling of saying “I do” surrounded by towering evergreens, golden afternoon light filtering through the canopy, and Mt. Rainier rising in the distance. Alder Grove was built for exactly that moment. Set on the former Crosby family tree farm three miles west of Castle Rock, WA — the official Gateway to Mount St. Helens — and just minutes off Interstate 5, we offer all the natural beauty of a destination forest wedding with the infrastructure, reliability, and accessibility of a professional venue.

The view of Mt. Rainier from our ceremony grounds is one of the most distinctive features of the property. Very few outdoor wedding venues in southwest Washington can offer a true Mt. Rainier backdrop, and fewer still pair it with the eastern presence of Mt. St. Helens — giving Alder Grove a Cascade Range setting that’s genuinely one of a kind in the region. Couples with family in both Portland and Seattle can host a wedding that’s roughly equidistant from both metro areas — about an hour from PDX, two hours from SEA — so out-of-town guests aren’t stuck choosing sides.

Our ceremony lawn comfortably hosts weddings from 25 to 300 guests, with flexibility for any layout you can imagine. Whether you’re picturing a traditional aisle lined with white chairs, a romantic boho draped arch, a rustic timber pergola, or something completely your own, the open grove accommodates it beautifully. Wooded paths, the on-property waterfall feature, manicured garden beds, and the Mt. Rainier-facing ceremony space give your photographer endless options for portraits — and your guests, plenty of beautiful corners to explore between ceremony and reception.

What’s Included with Your Wedding Booking

Alder Grove is designed to take the logistical weight off your shoulders. Every wedding booking includes:

  • Exclusive private use of the property and grounds for your event
  • Use of the private bridal quarters for pre-ceremony preparation
  • Access to the on-site catering building for your chosen caterer and bar service
  • On-premise lavatories — no portable units needed
  • On-site security throughout your event
  • Ample on-site parking for your guests
  • Access to all professionally landscaped gardens, lawn space, and forested portrait locations on the property
  • Coordination support to connect you with our vetted regional vendor network

Plan your wedding at Alder Grove in Castle Rock, WA

Plan your wedding at Alder Grove in Castle Rock, WA

Planning Your Wedding with Local Vendors

Alder Grove maintains relationships with a curated list of Pacific Northwest wedding vendors who know the property intimately — caterers, florists, photographers, DJs, rental companies, and bakeries based in Castle Rock, Longview, Toledo, Vancouver WA, and Portland. Working with vendors who have already worked at Alder Grove eliminates much of the uncertainty of an outdoor wedding. Setup goes faster, timelines run smoother, and the vendor team already knows where the power runs, where to stage, and how the light moves across the property through the day. See our full list on Our Vendors page.

A Setting Built for Photography

Wedding photographers love Alder Grove for one simple reason: every corner of the property is photogenic. The light through the alders is soft and even, the garden beds add color in every season, the waterfall feature provides a dramatic natural backdrop, and the open meadow with Mt. Rainier in the distance produces the kind of wide, cinematic shots that anchor a wedding album. The Voelker wedding, featured on our home page and photographed by Lauren Joslen Photography, is a beautiful example of what’s possible at the grove.

Lodging & Logistics for Out-of-Town Guests

Because Alder Grove sits just off I-5 in Castle Rock, out-of-town guests have an easy time getting to and from the venue. Nearby lodging includes Timberland Inn & Suites and Mt St. Helens Motel in Castle Rock, and additional hotel options are available in Longview and Kelso just south of town. The historic downtown of Castle Rock offers restaurants, a brewery, and quirky local attractions like Castle Rock Axe House — perfect for rehearsal dinner and welcome-night activities. For a destination-wedding feel, suggest guests fly into Portland International Airport (PDX), about an hour south.

Plan your wedding at Alder Grove in Castle Rock, WA

Schedule a Wedding Tour

If Alder Grove sounds like the kind of venue you’ve been imagining, the next step is a tour. Walking the property at 445 Growlers Gulch Road is the only way to truly feel the scale, the privacy, and the natural character of the grove. Reach out through our Contact Page to check date availability and arrange a visit.