Chapters · Greater Seattle & Issaquah Alps
Cascades to Sound.
The largest chapter in the Evergreen network, serving the Seattle metro area and the I-90 corridor.
01 / Regional Overview
Who we are.
The Cascades to Sound chapter covers the Seattle metro area, the Issaquah Alps, the I-90 corridor, and partner systems north to Bellingham. It's the largest chapter in the Evergreen network — both by membership and by trail count.
Signature trail systems include Tiger Mountain, Duthie Hill Mountain Bike Park, Raging River, Olallie State Park, Stossel Creek, Tolt MacDonald, and the I-5 Colonnade urban bike park.
The chapter runs weekly work parties from spring through fall, plus winter maintenance days and an annual chapter ride. New riders are welcome at every event — no experience required, no equipment to bring beyond water and gloves.
Join Cascades to Sound.
Your dues stay local — funding the trails you actually ride.
02 / Chapter Leadership
Your local crew.
The volunteers who lead this chapter — volunteer event organizers, advocacy point people, and your direct line to local trail decisions.
Matt Crisler
President
Jessica Mavica
Vice President
Adam Pinsky
Treasurer
Josh Tsang
Secretary
03 / Chapter Events
Get involved
near you.
Recurring volunteer work parties and one-off events, all filtered to the Cascades to Sound chapter. Join us out there.
Volunteer Work Parties
All work parties ↗Rides & Events
Full chapter calendar ↗Stay in the loop
Join the Cascades to Sound Newsletter.
Volunteer work parties, group rides, and trail news for Cascades to Sound — no spam, just dirt.
04 / Local Projects
What's being built
nearby.
Active trail projects in the Cascades to Sound region. Your chapter dues and donations help fund all of them.
Cedar River Trails - Renton Design
DesignBDOS - King County Maintenance
MaintenanceBDTC Restricted Funds
Feasibility05 / Take Action
Advocacy That
Affects This Region.
Active campaigns where your voice makes a difference. Contact your representatives in under five minutes.
Protect the Roadless Rule
Proposed federal changes could open pristine roadless areas to industrial development or apply blanket designations that restrict …
Why it matters: Broad designations without recreation protections can permanently lock bikes out of …
Take Action →Support Clear E-Moto Definitions & Trail Rules
State leaders are evaluating legislation to address the rapid rise of high-powered electric motorcycles (e-motos) on non-motorized …
Why it matters: High-speed e-motos tear up bicycle trail tread and threaten the land access agreements …
Take Action →Defend Non-Motorized Singletrack in USFS Travel Management
The U.S. Forest Service is evaluating motorized vehicle access across several national forest districts. Unvetted expansion into …
Why it matters: Unvetted expansion of motorized access into non-motorized zones leads to trail damage, …
Take Action →06 / Fund This Chapter
Build the trails
in your backyard.
Every Cascades to Sound dollar funds the work parties at Tiger, the maintenance at Duthie, and the chapter staff hours that make it all happen.
📍 Designating to: Cascades to Sound07 / Chapter News
From the
Cascades to Sound blog.
Recent posts and updates tagged for this chapter.
Recent Maintenance at Duthie Hill
A lot of work has been happening at Duthie over the past few months, with maintenance and rebuilds …
Jan 11, 2026A note on shared trails from the Tiger Summit Trailhead (East Tiger Mountain State Forest)
Late last week Evergreen Cascades to Sound Chapter leaders and Evergreen staff met with delegations …
May 27, 2025Duthie Jam 2025 Recap!
Duthie Jam went off earlier this month! With fresh reshapings of Gravy Train and GHY trails opening …
08 / Local Community
Teams, sponsors
& ways to ride.
Local Mountain Bike Teams
Issaquah MTB
Local mountain bike club based in Issaquah, building community and getting riders on trails across the Cascades to Sound region.
Learn more →
Crank Sisters
Evergreen's all-women riding community — free group rides, volunteer work parties, and events for women and femme-identifying riders of all levels.
Learn more →Chapter Sponsors
Sponsor list coming soon.
Featured Rides
Popular rides.
Rider-favorite routes across the Cascades to Sound region, curated on Trailforks. Tap any ride for the full route, map, and trail details.
Trail Map
Where we ride.
Explore the trails across the Cascades to Sound region — live conditions and details powered by Trailforks.
08 / Stay Connected
Stay connected
with Cascades to Sound.
Get chapter updates, volunteer event notices, and local trail news.