Green River

Mt. St. Helens AreaBest May–Oct

A long, gentle valley walk along the Green River through old growth on the north flank of Mt. St. Helens.

11.6 miDistance
942ftElevation
2,851ftHigh Point
Out & BackRoute
12h+Drive
moderateCrowds
RiverOld GrowthForest TrailGood in rain

About This Trail

The Green River Trail (#213) follows the river west down a glacier-carved valley on the north side of the Mt. St. Helens National Volcanic Monument. The trail runs through corridors of old-growth Douglas fir and western red cedar that escaped the 1980 lateral blast, with the river itself as the steady companion — wide, clear, and full of pools that draw elk to the margins at dawn and dusk.

Eleven and a half miles round trip with under a thousand feet of cumulative gain makes this a long but unhurried walk. Most parties turn around at the Vanson Ridge Trail junction near the midpoint; through-hikers continue west to connect with the Goat Mountain trail network. The grade stays gentle, the surface mostly dirt, the canopy mostly closed.

Access is the harder part of the day. Forest Road 26 has slumped sections, potholes, and stretches of broken pavement that punish low-clearance vehicles even though the trail itself sees no pass requirement. Wildlife is abundant — elk, black bear, deer — and the absence of crowds makes encounters more likely. A proposed open-pit copper mine upstream remains a long-term threat to the watershed.

Seasonal Highlights

MayTrillium and oxalis in the understory, river running high
JunLong days for the full mileage, mosquitoes near pools
SepFall colors begin in the maples, elk active in the meadows
OctQuiet shoulder season, low river exposes gravel bars

Astronomy

MoonWaning Gibbous (70%)
Stargazingexcellent

Trail Conditions

Scorecard

strikingBeautyOld-growth corridors and a wide river that escaped the 1980 blast.
Type 1.4Fun
2/5Difficulty
4/5Wildness
1/5Exposure
3.5/5Reward
3/5Effort
quietCrowds

Rough access road and long mileage filter out casual visitors. Most parties see few others on the trail.

Safety & Considerations

Today's Hazard

  • Strong sun — sunscreen, hat, and sunglasses recommended; water reflection adds glare near the lake

Persistent Hazards

  • Forest Road 26 has slumps, potholes, and broken pavement — low-clearance vehicles take damage
  • Elk and black bear active throughout the corridor
  • Long mileage with no quick exits

Getting There

Google MapsApple Maps
Road Access

High-clearance vehicle recommended

Parking

Road shoulder parking at the trailhead on Forest Road 26. No pass required, but the access road is rough.

Similar Hikes