Mount Si, WA — USGS historical 15-minute topo (1960)
by USGS Historical Topo Maps (public domain) · Washington, US
A free GeoPDF for offline GPS in the Cartahaven app, with free updates. How it works offline
Try it now, no account needed
Open this map in the Cartahaven map app in your browser and see your GPS position on it.
Older edition. This is the 1960 edition from the U.S. Geological Survey. A newer one may have been published since; check the agency's page for current rules and routes before relying on it.

What you get
- Your GPS position on the map. A blue dot on this official sheet shows where you are.
- Works with no signal. Download it once; the map and your GPS position keep working with no cell signal.
- Tracks, placemarks and photos. Record where you go, drop pins, and export GPX, KML or GeoJSON.
- Free updates. When a new edition is published here, it’s yours at no cost.
- 1Tap “Get this map”: it’s added to your free account.
- 2Open the Cartahaven app on your phone and sign in.
- 3Tap “My purchases” (“Get my maps” before you sign in). It’s on your phone, ready offline.
The app runs on iPhone, Android and in desktop browsers. Install it · How offline GPS works
Where this map covers
Named places on this map
59 named features inside the Mount Si, WA — USGS historical 15-minute topo (1960) sheet, from the USGS Geographic Names Information System. Each one links to every map that shows it.
Peaks and ridges
Lakes, springs and falls
- Bench Lake · lake
- Black Lake · lake
- Boomerang Lake · lake
- Calligan Lake · lake
- Cougar Lake · lake
- Crater Lake · lake
- Crater Lake · lake
- Elbow Lake · lake
- Fitchener Slough · lake
- Fury Lake · swamp
- Goat Mountain Lake · lake
- Honey Lake · lake
- Horseshoe Lake · lake
- Lake Blethen · lake
- Lake Elizabeth · lake
- Lake Hancock · lake
- Lake Isabella · lake
- Lake Moolock · lake
- Lake Nadeau · lake
- Lake Philippa · lake
- Lake Titicaca · lake
- Little Calligan Lake · lake
- Loch Katrine · lake
- Lynch Lake · lake
and 18 more
Gaps, arches and other landforms
- Devils Slide · cape
- Illinois Basin · basin
Elevations are the USGS 3DEP ground elevation at the named point, rounded; a summit's surveyed height can differ a little.
More maps of Mt. Baker-Snoqualmie National Forest and Washington.
Maps nearby
More maps around here ›
Mount Phelps, WA — USGS 7.5-minute topo (2023)
USGS Topo Maps (public domain) · Washington
Public domain

Motor Vehicle Use Map — Skykomish Ranger District — Mount Baker-Snoqualmie National Forest (2025)
Forest Service Maps (public domain) · Mount Baker-Snoqualmie National Forest
Public domain

IFR Enroute Low Altitude Chart L-01 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain

IFR Enroute Low Altitude Chart L-13 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain

IFR Enroute High Altitude Chart H-01 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain

IFR Enroute Low Altitude Chart L-01 (Alaska) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
Version history
Version 1 · Nov 4, 2026 · 10.9 MB