Rocky Mountain National Park: Storm Pass via Boulder Brook Trail

This rolling, 20.6-mile lasso, only a few miles from Longs Peak, climbs to views on Granite Pass, drops down Boulder Brook, then ascends to forested Storm Pass.
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This rolling, 20.6-mile lasso, only a few miles from Longs Peak, climbs to views on Granite Pass, drops down Boulder Brook, then ascends to forested Storm Pass.

INFO For information on permits, current trail and camp conditions, and wilderness guidelines, go to nps.gov/romo/planyourvisit/backcountry.htm

PERMIT A wilderness permit is required for all overnight camping in the backcountry. Reservations accepted ($20 administrative fee for permits during peak season). nps.gov/romo/planyourvisit/backcntry_guide.htm

CONTACT Rocky Mountain National Park, (970) 586-1206; nps.gov/romo

-Mapped by Tim Shisler

Trail Facts

  • Distance: 33.1

Waypoints

STM001

Location: 40.306355, -105.537972

Hike south from the trailhead at Lily Lake.

STM002

Location: 40.304829, -105.54014

Bear left at the Y-junction, heading southwest.

STM003

Location: 40.300591, -105.545343

Go straight at the 4-way junction, and cross the bridge over Aspen Brook.

STM004

Location: 40.291998, -105.570202

Catch a view of Longs Peak as you near Storm Pass.

STM005

Location: 40.293066, -105.573742

Storm Pass: Turn left at the 4-way toward Longs Peak. The return route reconnects with the outbound route at this junction.

STM006

Location: 40.286908, -105.565009

Turn right at the 3-way junction.

STM007

Location: 40.286652, -105.56811

Campsite

STM008

Location: 40.284453, -105.571935

Pass Eugenia Mine, and cross Inn Brook.

STM009

Location: 40.27504, -105.564301

Turn right at the T-junction.

STM010

Location: 40.272812, -105.56985

Camp

STM011

Location: 40.273256, -105.58018

Cross a bridge over Alpine Brook.

STM012

Location: 40.270845, -105.584262

Turn right at the 3-way junction.

STM013

Location: 40.271741, -105.58887

The trail passes through Jims Grove before veering left on a westward climb to Granite Pass.

STM014

Location: 40.274058, -105.605478

Granite Pass: Turn right (north) at the 3-way junction.

STM015

Location: 40.289629, -105.603096

Descend below treeline.

STM016

Location: 40.286712, -105.610843

Hike through thick pine forest.

STM017

Location: 40.287858, -105.612774

Cross Boulder Brook.

STM018

Location: 40.288971, -105.617065

Bear right at the 3-way on Boulder Brook Trail.

STM019

Location: 40.291981, -105.61742

Camp

STM020

Location: 40.316725, -105.615799

Turn right at 4-way.

STM021

Location: 40.314871, -105.612186

Bear right at the Y-junction.

STM022

Location: 40.311321, -105.606916

Continue straight at the 3-way.

STM023

Location: 40.307285, -105.600072

Stream crossing

STM024

Location: 40.296042, -105.582961

The trail veers to the left toward Storm Pass.

STM025

Location: 40.293042, -105.573828

Continue straight at the 4-way to return to the trailhead.