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Scheduled Maintenance Notice
USGS will be performing maintenance on the time series data processing system beginning at 09:00 EDT on September 10, 2026. During this period, delivery of the latest time series data will be delayed. The maintenance is expected to finish within 2 hours, after which all backlogged time series data will be processed and delivered to WDFN web portals and APIs.

This station is operated seasonally (Streamflow April - October; Water temperature April - September).

Available data

Select data types to graph from categories based on the way the data were collected.

3 data types available - data from 2001-06-13 to 2026-09-09

2 data types available - data from 1959-10-01 to 2026-09-08

2 data types available - data from 2001-06-12 to 2026-08-19

15 Observed properties (data types) available - with data from 1965-06-13 to 2013-09-04

65 Sampling activities

2 data types available - with data from 1960-06-10 to 2025-08-01

2 data types available - data from 1959-10-01 to 2026-09-07

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Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	06102050	n/a
Location name	Marias River near Loma MT	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	47.9459027777778	n/a
Decimal longitude (WGS84)	-110.580838888889	n/a
Latitude-longitude method	Interpolated from digital map	N
Latitude-longitude accuracy	Accurate to + or - .1 sec (Differentially-Corrected GPS).	1
District	Montana	30
State	Montana	30
County	Chouteau County	015
Country	United States of America	n/a
Altitude of gage/land surface	2570 feet	n/a
Method altitude determined	Interpolated from topographic map.	M
Altitude accuracy	1 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	Marias	10030203
Drainage basin		n/a
Date of first construction		n/a
Drainage area	7027 square miles	n/a
Contributing drainage area	6480 square miles	n/a
Time zone abbreviation	MST	n/a
Site honors Daylight Saving Time	Y	n/a
National aquifer		n/a
Local aquifer		n/a
Local aquifer type		n/a
Well depth		n/a
Hole depth		n/a
Source of depth data		n/a