Boulder River

Arlington, Washington

Washington

Free — you'll pick up right here.

No verdict for this water

We won't guess. Here is exactly what we do and don't know.

What we do know

  • Inside Mt. Baker-Snoqualmie National Forest

    3 managing-area boundaries mapped — agency alerts for them feed this page automatically.

    Boundary data

What's missing

  • No access route mapped

    We don't yet know which road reaches this trailhead, so we can't tell you if it's gated.

Nobody's filed a report here yet — be the first.

Why you'll love it

14.3 mi run
Flows year-round
234 cfs avg flow

River facts

Water
Flows year-round
Average flow
234 cfs
Average current
1.4 ft/s
Gradient
249.6 ft/mi
Drainage area
26 sq mi

Long-term averages modeled by USGS (NHDPlus HR), not today's conditions. Check a gauge before you go.

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Boulder River

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Photos

Directions & GPX

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Permits & access

Managing agency
Forest Service

About this water

Boulder River is a 14-mile paddling stretch near Arlington, Washington. It flows year-round. USGS models an average flow of about 234 cfs and a gradient of about 249.6 feet per mile. Land along it is managed by the U.S. Forest Service.

Facts about this water

Where it is

Managed by
Forest Service

Source: Wilderness.net boundaries; USFS EDW boundaries; USGS PAD-US 4.1

Conditions

Active alerts for Darrington Ranger District as of Oct 9, 2026:

Source: USFS forest alerts

Nearby

Source: Roamze catalog (indexable pages within 10 miles, PostGIS distance)

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Keep exploring — more water worth the drive

Sultan RiverPhoto: USGS, Public domain (via Wikimedia Commons)

Sultan River

~33 min drive

Sultan River is a 21-mile paddling stretch near Sultan, Washington. It flows year-round. USGS models an average flow of about 776 cfs and a gradient of about 143.2 feet per mile. Land along it is managed by the state natural resources department.

Darrington Mill Boat Launch

~15 min drive

Darrington Mill Boat Launch is a boat launch in Washington.

Lower Sauk Boat Launch

~23 min drive

A worthwhile stop near Washington.

Sauk RiverPhoto: Drums600 at English Wikipedia, Public domain (via Wikimedia Commons)

Sauk River

~20 min drive

Sauk River is a 0.2-mile paddling stretch near Darrington, Washington. It flows year-round. USGS models an average flow of about 1,839 cfs. Land along it is managed by the U.S. Forest Service.

Sauk Boat Launch

~23 min drive

A worthwhile stop near Washington.

Clear Creek Campground

~16 min drive

A worthwhile stop near Washington.

Pilchuck RiverPhoto: Shannon1, CC BY-SA 4.0 (via Wikimedia Commons)

Pilchuck River

~26 min drive

Pilchuck River is a 9.5-mile paddling stretch near Granite Falls, Washington. It flows year-round. USGS models an average flow of about 317 cfs and a gradient of about 300.5 feet per mile. Land along it is managed by the state natural resources department.

White Chuck Boat Launch

~25 min drive

A worthwhile stop near Washington.

French Creek

~2 min drive

French Creek is a 7.2-mile paddling stretch near Arlington, Washington. It is intermittent and may run dry in some seasons. USGS models an average flow of about 65 cfs and a gradient of about 490.9 feet per mile. Land along it is managed by the U.S. Forest Service.

White Creek River Access

~27 min drive

A worthwhile stop near Washington.

Guided trips nearby

Local operators near Arlingtonoffering guided trips. You book directly with them — Roamze doesn’t take a cut.

Cascade Views RV Resort

Kayaking business nearby (~25 mi away) — hasn't claimed their Roamze page yet

View operator

Port Susan Camping Club

Kayaking business nearby (~26 mi away) — hasn't claimed their Roamze page yet

View operator

WhatsSup

Kayaking business nearby (~40 mi away) — hasn't claimed their Roamze page yet

View operator