Agency-listedUSFS · dispersedFree

Old Mill Spring

Drive-up · U.S. Forest Service · MT · 45.58742, -104.17145
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U.S. Forest Service lists this site. On most of their ground you can camp away from developed sites pretty much anywhere — so treat this as a known-good spot, not the only one allowed. The unit sets stay limits and how far off road and water you must be. What changes is conditions — roads, gates, closures, fire rules. Check those with the unit before you commit to the drive.
USGS topo — contours & terrain
USGS topographic map of Old Mill Spring
Aerial — USGS / NAIP
Aerial image of Old Mill Spring
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Weather outlook — at Old Mill Spring
Loading the latest forecast…
Live NWS area forecast (~2.5 km grid, not elevation-corrected). Camp sits at 3,597 ft.
Fire & smoke — around Old Mill SpringNIFC · AirNow
Checking active fires & air quality…
Active wildfires from NIFC (within ~50 mi); air quality from AirNow. Always confirm current fire restrictions with the managing office before you go.

Everything you need — measured from Old Mill Spring · Custer Gallatin National Forest · MT

15 MI30 MI60 MIYOUR CAMPN ↑Dump · 54 miDFuel · 28 miFSuper Valu · Grocery · 30 miGRexall · Pharmacy · 54 miRxBaker Area Hardware · Hardware · 54 miHSpiffy's · Mechanic · 54 miMMom's Laundry · Laundry · 54 miLUrgent care · 28 mi+Camp Crook Post Office · Mail · 10 mi@Spearfish, SD - Tesla Supercharger · EV fast charger · 75 mi (beyond the 60-mi ring)EV
Straight-line miles · bearings approx · roads run longer
Nearest of each
  • @Mail10 mi
  • FFuel28 mi
  • +Urgent care28 mi
  • GGrocery30 mi
  • DDump54 mi
  • RxPharmacy54 mi
  • HHardware54 mi
  • LLaundry54 mi
  • MMechanic54 mi
  • EVEV fast charger75 mi
≤30 mi30–4545+water

The read: fuel & food sit about 28 mi out, the nearest EV fast charger is a 75-mi run (and back).

Not within 60 mi: Water, Propane. Plan those before you head up.

One dot per need — the nearest of each kind, straight-line from camp. Places from OpenStreetMap (© OpenStreetMap contributors); the EV fast charger from the US DOE station locator. Open in Google Maps ↗

The site — Old Mill Spring

Access
Drive-up
Land
U.S. Forest Service · dispersed
Elevation
3,597 ft
State
MT
Coordinates
45.58742, -104.17145
Cost
Free

Nearby & resupply — around Old Mill Spring · Custer Gallatin National Forest · MT (OpenStreetMap)

  • Nearest townCamp Crook · ~9.9 mi
  • Drinking waternone within 10 mi
  • FuelFuel · ~27.7 mi
  • Propane / LPGnone within 31 mi
  • Groceriesnone within 30 mi
  • Hospital / clinicDahl Memorial Healthcare · ~27.7 mi
  • Mapping is thin out hereAn empty row means nothing is mapped within that radius — not that nothing exists. Small stores, seasonal resorts and single fuel pumps out here often never make it onto the map. Treat these as unconfirmed and ask locally.

EV charging — from Old Mill Spring · Custer Gallatin National Forest · MT — nearest public DC fast & Level 2 (US DOE station data)

Nearby restrooms — around Old Mill Spring · Custer Gallatin National Forest · MT — pit toilets, restrooms & rest areas (government data)

Open Old Mill Spring elsewhere

Other camps near Old Mill Spring

If this one is full, gated or washed out.

The unit that manages Old Mill Spring

Stay limits, road closures and fire restrictions at Old Mill Spring are set by Custer Gallatin National Forest, not by the campsite — check there before you go.

How we know this — Old Mill Spring

Source
U.S. Forest Service recreation data
Confidence
Likely — The record is good enough to put a pin on, but thin in places. Treat the details as a starting point, not gospel.
How it was placed
USFS/BLM authoritative: free & dispersed. Access not field-checked (assumed drive-up).
EV chargers
US DOE Alternative Fuels Data Center station locator, snapshot 2026-09-16. Straight-line miles to the nearest public, open, unrestricted station; restricted and planned units are shown but never counted.
Field check
On the agency's books. The land manager inventoried this site, so its existence is not in question — current conditions are. Nobody from here has camped it recently.

What we don’t know about Old Mill Spring

A land record can put you within a few meters of a spot. It cannot tell you any of this — so check it yourself, and treat anything below as the open question it is.

Before you go — Old Mill Spring

Been here? Tell us what changed. This page is built from public records, so the fastest way it gets better is somebody who has actually pulled in. Road washed out, site gone, gate locked, or it is exactly as described — all of it useful. Send a report →