Keekwulee Falls via Denny Creek Trail

Located in the Mount Baker-Snoqualmie National Forest, the hike to Keekwulee Falls via the Denny Creek Trail is a classic Washington adventure. Just off I-90 near Snoqualmie Pass, this popular trail offers lush forest scenery, cascading waterfalls, and a beloved natural water slide. It’s a great option for families, beginners, and anyone looking for a scenic, half-day hike that includes a refreshing stop by the water.

Trail Overview

• Trail Name: Denny Creek Trail to Keekwulee Falls

• Location: Mount Baker-Snoqualmie National Forest, near Snoqualmie Pass, WA

• Difficulty: Easy to moderate

• Trail Type: Out-and-back

• Season: Late spring to early fall (snow may linger into June)

Trail Description

The trail starts at the Denny Creek Trailhead and gently ascends through lush second-growth forest, with shaded pathways, wooden bridges, and views of surrounding ridgelines. At about 1 mile in, hikers reach “The Slabs”—a smooth granite section of Denny Creek where the water flows gently enough to create a natural waterslide. This spot is especially popular in the summer for families and those wanting to cool off.

Continue another mile to reach Keekwulee Falls, a beautiful multi-tiered waterfall cascading through mossy rocks and dense evergreens. There’s a wooden footbridge near the base that offers a great view of the falls, and areas nearby to rest or have a snack.

Swimming & Water Features

• Swimming:

  • While Keekwulee Falls itself is not swimmable due to slippery rocks and strong current, the slabs area offers shallow pools perfect for wading and sliding during low water.

  • Use caution—rocks can be slippery, and water levels change depending on season and recent rainfall.

• Best Time for Water Play:

  • Mid-summer (July to early September), when water levels are lower and temps are higher.

What to Bring

• Hiking shoes or sturdy sandals with good grip (especially if planning to play in water)

• Swimsuit and towel if planning to use the slabs or wade in shallow pools

• Trekking poles (optional, but helpful on rocky or root-filled sections)

• Snacks, sun protection, and water – there’s no potable water at the trailhead

• Map or GPS – cell service is limited

• Bug spray in late spring and summer

• Northwest Forest Pass or day-use fee for parking

Dog Policy

• Dogs are allowed on the Denny Creek Trail and at Keekwulee Falls

• Must be leashed at all times

• Be mindful near water features and other trail users

• Pack out all pet waste

Parking & Access

• Trailhead: Denny Creek Trailhead (Exit 47 off I-90)

• Parking: Paved lot with additional overflow nearby. Don't forget NW Forest Pass

• Restrooms: Vault toilets available at the trailhead

• Arrive early on weekends — this is a popular hike, especially in summer

Important Notes

• The trail can be muddy or slick in early season — waterproof boots recommended in May/June

• Not wheelchair or stroller accessible

• Best hiked June through October; check trail reports for snow conditions in spring

• Popular with families, but younger children may need help navigating roots and rocks

Summary

Keekwulee Falls via the Denny Creek Trail is a beautiful, accessible hike with a perfect mix of forest serenity, playful water features, and rewarding waterfall views. Ideal for a summer day trip from Seattle, this hike combines the best of Pacific Northwest nature with opportunities to cool off and explore. Whether you’re hiking solo, with kids, or your dog, it’s an unforgettable stop in the Cascades.