Montana Boring Logs & Geotechnical Data
6,950 public boring logs in Montana; 6,835 with digitized SPT, soil or CPT data; 115 scanned log PDFs. Sources include Montana DOT (MDT), Montana DOT (MDT) – MWD, plus public reports found by web crawl. Free to search on the map, download or query by API.
Where the data comes from
Web-crawled reports in Montana were published on, among others: deq.mt.gov, semspub.epa.gov, ftp.mdt.mt.gov, mdt.mt.gov, fwp.mt.gov, dojmt.gov.
Counties with the most boring logs
| County | Boring logs | |
|---|---|---|
| Cascade | 417 | view on map |
| Lewis and Clark | 406 | view on map |
| Fergus | 359 | view on map |
| Teton | 351 | view on map |
| Missoula | 321 | view on map |
| Richland | 305 | view on map |
| Carbon | 270 | view on map |
| Gallatin | 267 | view on map |
| Yellowstone | 234 | view on map |
| Rosebud | 223 | view on map |
| Flathead | 204 | view on map |
| Glacier | 178 | view on map |
What's in a boring log from Montana
The 6,835 digitized borings carry the data engineers actually use: SPT blow counts (N-values) by depth, soil and rock descriptions, groundwater observations and, where the source ran cone penetration tests, CPT tip resistance and sleeve friction. A further 115 logs are scanned PDF reports — the original agency drawings — which you can open and download from the map. Holes are typically about 18 ft (6 m) deep; one in twenty goes past 75 ft (23 m). Not sure what a boring log looks like? See annotated example boring logs.
How to get this data
- Map — pan to a site, click a boring, and view the log, the original PDF, or an ML soil-profile prediction. No account needed.
- Downloads — every boring exports as PDF, DIGGS XML or AGS4; draw a polygon on the map for a multi-boring export or a site report.
- API — query borings by coordinates or bounding box, pull SPT/CPT/lab records, and generate site reports programmatically.
- Contribute — have Montana boring logs that are not here yet? We take PDFs, DIGGS, AGS and spreadsheets.
This data was collected from public agencies and is republished as-is. It is a planning tool, not a substitute for a site investigation; see the terms and disclaimer. Counts refreshed 13 October 2026.
Other places
Washington (199,045)Florida (172,401)North Carolina (102,530)Ohio (80,932)Oregon (73,397)California (58,907) all regions →