New Mexico Snowpack & River Runoff

Snow-water equivalent by basin and the seasonal runoff outlook for New Mexico's rivers, translated into what it means for fishing — early or late runoff, high or low summer flows, and which waters hold up best. Updated daily through the snow season.

New Mexico's snowpack is running thin this year — the statewide figure of 10% of normal means runoff peaked early and summer flows will thin out faster than usual. The higher-elevation freestones won't fish for long; tailwaters and spring creeks will carry more of the season.

If you're planning trips this year, bias toward tailwaters with cold dam releases and spring creeks that aren't snowmelt-driven. Smaller freestones in the lower elevations may warm into marginal water by mid-summer.

Basin SWE vs. median — water year 2026

Average across the New Mexico basins we track, in inches of snow-water equivalent.

2 New Mexico rivers tracked

River	Region	Basin snowpack	SWE now / normal	Median melt-out	Runoff forecast
San Juan River	Northwest New Mexico	10%of normal	0.1" / 1.0"	~Jun 21	19%Jun–Jul · 25k acre-ft
Rio Grande	North-Central New Mexico	—	0.1" / 0.0"	~May 29	15%May–Jul · 55k acre-ft

Runoff forecasts are the projected seasonal streamflow volume versus the long-term average, issued monthly January–June. Only rivers with a published forecast point show one.

Snowpack percentages compare current basin snow-water content to historical norms; the New Mexico figure is statewide, not specific to any one basin. Snowpack varies with elevation and aspect — treat basin figures as a guide. Updated Jun 14, 2026.

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