Streamflow, conditions and background by watershed segment. Data through November 1, 2026.
Where it is
Segments are the HUC8 watersheds the gauges sit in, numbered upstream to downstream. Use the buttons to switch between the state and the river.
50 km (31 mi)
1Purgatoire
river and reservoirs
gauge
About the Purgatoire River
This report follows 199 miles (321 km) of the Purgatoire River, all within the Purgatoire watershed segment. At the lower end of the report the river drains about 3,449 square miles. Named tributaries joining it here include the Chacuaco Creek, Van Bremer Arroyo, San Francisco Creek, Trinchera Creek and Chicosa Arroyo. Largest urban areas near it: Trinidad. 9 gauges with at least 26 weeks of daily flow cover 1896 to 2026.
From the archive: NHDPlus river network, WBD watersheds, NHD waterbodies, TIGER urban areas and the report's gauges.
From the headwaters down
Each watershed segment in order, with last week's flow rated against the same week in 1991–2020.
1
Segment 1: Purgatoire
44 cfs last week normal, 228 dry days this year.
Towns: Trinidad.
Water 12.0 °C at Purgatoire River Near Thatcher, CO. Median conductance 2,790 µS/cm in the 2020s. Rain over the last 3 months: 201% of normal.
Reservoirs
Reservoirs on the river
Reservoir
Completed
Main purpose
Storage, acre-ft
Trinidad Dam
1976
Flood Risk Reduction
164,930
From the archive: National Inventory of Dams (USACE) and the reservoir registry.
Sources
Numbered sources for the statements above, as they were read when the page was prepared.