Mill Iron, MT Forest Service Topo Map (FSTopo)
by Forest Service FSTopo Quads (public domain), US
A free GeoPDF for offline GPS in the Cartahaven app, with free updates. How it works offline
About the Mill Iron quad
The Mill Iron quadrangle is a Forest Service FSTopo 7.5-minute map at 1:24,000 covering about 7 × 9.4 mi of Carter County, Montana. It overlaps Custer Gallatin National Forest. The GeoPDF is 1.4 MB.
All Montana Forest Service FSTopo maps · Montana hunting units
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 “Get my maps”. 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
15 named features inside the Mill Iron — Forest Service FSTopo 7.5-minute quad sheet, from the USGS Geographic Names Information System. Each one links to every map that shows it.
Peaks and ridges
Lakes, springs and falls
- Arpan Spring · spring
- Bar C Reservoir · reservoir
- Flat Reservoir · reservoir
- Hatch Spring · spring
- Herman Reservoir · reservoir
- Iron Spring · spring
- L O Reservoir · reservoir
- L/W Reservoir · reservoir
- Last Chance Spring · spring
- Patton Spring · spring
- Patton Spring Number 2 · spring
- Red Bluff Spring · spring
- Willow Spring · spring
- Wood Gulch Spring · spring
Elevations are the USGS 3DEP ground elevation at the named point, rounded; a summit's surveyed height can differ a little.
More maps of Custer Gallatin National Forest.
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Version history
Version 1 · Nov 8, 2026 · 1.4 MB