Seattle / Puget Sound Mesh
The Seattle and Puget Sound area is served by both CascadiaMesh (MeshCore) and a large Meshtastic community. The region's dramatic topography — Puget Sound, multiple mountain ranges, and the Olympic Peninsula — creates both exceptional hilltop sites and deep RF shadows in valleys.
Network overview
| Field | Value |
|---|---|
| Primary MeshCore network | CascadiaMesh (cascadiamesh.org) |
| Protocol | MeshCore |
| Frequency preset | USA/Canada (910.525 MHz / SF7 / 62.5 kHz BW / CR5) |
| Coverage area | Seattle metro, Eastside (Bellevue/Redmond), North Sound to Everett, South Sound to Tacoma/Olympia; I-90 corridor to Snoqualmie Pass |
| Also covered by | WCMesh (West Coast Mesh) — shared infrastructure with Portland corridor |
Terrain and coverage
Puget Sound geography creates natural repeater sites with excellent coverage:
- Queen Anne Hill / Capitol Hill / Beacon Hill: Prominent Seattle ridges; rooftop nodes here cover downtown and surrounding neighborhoods
- Cougar Mountain / Tiger Mountain (Issaquah Alps): 1,500–3,000 ft; covers entire Eastside and cross-sound to Seattle
- Rattlesnake Ledge: Popular hiking destination with existing amateur radio infrastructure; community repeaters here cover I-90 corridor
- Cascade foothills: Several CascadiaMesh repeaters on foothills east of Seattle; part of the I-5 Project corridor
CascadiaMesh I-5 Project
CascadiaMesh's primary infrastructure goal is continuous mesh coverage along I-5 from the Canadian border to the Oregon/California border. In the Seattle area, nodes in Everett, Seattle, Federal Way, and Tacoma form the I-5 backbone. See the CascadiaMesh page for the full I-5 Project status.
Cross-sound limitations
Puget Sound itself is an RF-friendly propagation medium (water), but the Olympic Peninsula to the west creates a significant shadow. There is no practical MeshCore coverage on the Olympic Peninsula except from high-altitude sites or dedicated ferry route nodes. The Kitsap Peninsula is partially covered by higher nodes.
Meshtastic community
Seattle has one of the largest Meshtastic communities in the Pacific Northwest, using Long Fast preset primarily. The Meshtastic and MeshCore communities are separate but cooperate on shared tower sites in some locations. See the Meshtastic regional pages for Meshtastic-specific configuration.
Community resources
- CascadiaMesh: cascadiamesh.org — primary MeshCore community for the region
- WCMesh: wcmesh.com — West Coast Mesh, covers I-5 from BC to Oregon
- Discord: CascadiaMesh Discord (link on cascadiamesh.org) — #seattle channel
- Network map: meshmap.net (filter to 915 MHz)
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