Colorado SNOTEL Snowpack Update Report

Colorado SNOTEL Snowpack Update Report

Based on Mountain Data from NRCS SNOTEL Sites

**Provisional data, subject to revision**

Data based on the first reading of the day (typically 00:00) for Monday, May 12, 2025

Basin Site Name	Elev (ft)	Snow Water Equivalent				Percent of
Basin Site Name	Elev (ft)	Current (in)	Today's Median (in)	Median Peak (in)	Median Peak Date	Today's Median	Median Peak
GUNNISON RIVER BASIN
Butte	10190	0.2	5.8	13.7	Apr 08	3	1
Castle Peak	11500	22.8	N/A	N/A	N/A	*	*
Cochetopa Pass	10020	0.0	0.0₍₁₆₎	4.8₍₁₆₎	Mar 29₍₁₆₎	*	0*
Columbine Pass	9160	0.0	0.0	18.0	Mar 26	*	0*
Idarado	9780	0.0	1.4	14.4	Apr 06	0	0
Mc Clure Pass	8760	0.0	1.4	16.6	Apr 04	0*	0*
Mesa Lakes	10160	0.8	11.8	19.0	Apr 15	7	4
Overland Res.	9890	0.1	1.3	12.4	Apr 05	8	1
Park Cone	9600	0.0	0.6	10.4	Apr 09	0*	0*
Park Reservoir	9990	9.9	23.8	27.4	Apr 26	42	36
Porphyry Creek	10790	9.5	9.4	17.0	Apr 15	101	56
Rat Creek	11680	3.9	N/A	N/A	N/A	*	*
Red Mountain Pass	11050	14.6	20.6	25.0	Apr 25	71	58
Sargents Mesa	11490	0.2	8.2₍₁₂₎	11.4₍₁₂₎	Apr 13₍₁₂₎	2	2
Schofield Pass	10640	13.9	29.0	35.1	Apr 19	48	40
Slumgullion	11560	0.0	10.7	15.0	Apr 21	0	0
Upper Taylor	10710	0.0	6.6₍₁₁₎	13.6₍₁₁₎	Apr 03₍₁₁₎	0	0
Wager Gulch	11110	0.1	N/A	N/A	N/A	*	*
Basin Index (%)		38
UPPER COLORADO RIVER BASIN
Arapaho Ridge	10960	15.2	22.4₍₁₈₎	25.2₍₁₈₎	May 01₍₁₈₎	68	60
Bear River	9100	0.0	8.2₍₁₆₎	12.0₍₁₆₎	Apr 21₍₁₆₎	0	0
Beaver Ck Village	8530	0.0	0.0₍₁₇₎	11.7₍₁₇₎	Apr 02₍₁₇₎	*	0*
Berthoud Summit	11300	18.2	21.2	23.2	May 03	86	78
Bison Lake	10950	12.0	26.5	26.9	Apr 29	45	45
Buffalo Park	9240	4.1	10.3₍₂₅₎	14.9₍₂₅₎	Apr 14₍₂₅₎	40	28
Castle Peak	11500	22.8	N/A	N/A	N/A	*	*
Chapman Tunnel	10090	2.0	8.4₍₁₃₎	15.4₍₁₃₎	Apr 19₍₁₃₎	24	13
Columbine	9170	1.2	10.8	24.6	Apr 05	11	5
Copper Mountain	10500	11.4	12.9	17.4	Apr 26	88	66
Elliot Ridge	10550	13.6	18.1₍₁₁₎	23.2₍₁₁₎	Apr 25₍₁₁₎	75	59
Fool Creek	11130	20.0	N/A	N/A	N/A	*	*
Fremont Pass	11310	17.7	19.6	20.8	May 11	90	85
Grizzly Peak	11110	15.0	14.4	19.6	Apr 21	104	77
High Lonesome	10630	13.5	N/A	N/A	N/A	*	*
Hoosier Pass	11600	12.0	15.3	17.3	Apr 27	78	69
Independence Pass	10570	4.2	11.7	17.4	Apr 18	36	24
Ivanhoe	10540	10.5	13.6₍₂₉₎	17.2₍₂₉₎	Apr 26₍₂₉₎	77	61
Jones Pass	10420	5.7	15.1₍₂₁₎	16.8₍₂₁₎	Apr 27₍₂₁₎	38	34
Kiln	9610	0.0	2.6	13.2	Apr 07	0	0
Lake Irene	10680	16.2	21.6	25.4	Apr 26	75	64
Lynx Pass	8910	0.2	0.0	11.5	Apr 04	*	2*
Mc Clure Pass	8760	0.0	1.4	16.6	Apr 04	0*	0*
Mccoy Park	9500	0.0	3.0₍₁₈₎	14.6₍₁₈₎	Apr 07₍₁₈₎	0	0
Mesa Lakes	10160	0.8	11.8	19.0	Apr 15	7	4
Middle Fork Camp	8960	0.0	1.0₍₁₉₎	11.5₍₁₉₎	Apr 04₍₁₉₎	0*	0*
Nast Lake	8710	0.0	0.0	8.8	Mar 28	*	0*
North Lost Trail	9190	0.0	4.1	17.4	Apr 04	0	0
Overland Res.	9890	0.1	1.3	12.4	Apr 05	8	1
Park Reservoir	9990	9.9	23.8	27.4	Apr 26	42	36
Phantom Valley	9030	0.0	0.7	10.4	Mar 30	0*	0*
Schofield Pass	10640	13.9	29.0	35.1	Apr 19	48	40
Stillwater Creek	8760	0.1	N/A	N/A	N/A	*	*
Summit Ranch	9350	0.0	0.7	11.4	Apr 09	0*	0*
Vail Mountain	10290	0.1	17.0	20.8	Apr 27	1	0
Willow Creek Pass	9520	9.7	13.6	16.4	May 03	71	59
Basin Index (%)		54
SOUTH PLATTE RIVER BASIN
Bear Lake	9490	10.8	16.9	19.8	Apr 27	64	55
Berthoud Summit	11300	18.2	21.2	23.2	May 03	86	78
Black Mountain	8950	0.0	6.6₍₁₀₎	12.5₍₁₀₎	Apr 17₍₁₀₎	0	0
Buckskin Joe	11160	7.9	11.3₍₂₁₎	12.6₍₂₁₎	May 02₍₂₁₎	70	63
Copeland Lake	8570	0.1	0.0	6.0	Mar 08	*	2*
Deadman Hill	10240	11.8	18.5	21.8	May 04	64	54
Echo Lake	10660	7.0	7.2₍₂₂₎	9.0₍₂₂₎	Apr 29₍₂₂₎	97	78
Hoosier Pass	11600	12.0	15.3	17.3	Apr 27	78	69
Hourglass Lake	9380	0.1	8.8₍₁₂₎	13.0₍₁₂₎	Apr 19₍₁₂₎	1	1
Jackwhacker Gulch	11030	5.8	11.8₍₂₂₎	14.4₍₂₂₎	Apr 25₍₂₂₎	49	40
Joe Wright	10140	17.7	22.4	24.0	May 05	79	74
Lake Eldora	9700	0.1	2.8	14.0	Apr 09	4	1
Lake Irene	10680	16.2	21.6	25.4	Apr 26	75	64
Long Draw Resv	9990	8.7	16.1₍₁₁₎	18.3₍₁₁₎	Apr 27₍₁₁₎	54	48
Loveland Basin	11410	21.8	22.8₍₂₈₎	24.4₍₂₈₎	May 02₍₂₈₎	96	89
Michigan Creek	10700	5.3	11.4₍₂₂₎	13.2₍₂₂₎	Apr 26₍₂₂₎	46	40
Niwot	9940	5.6	10.5	15.0	Apr 19	53	37
Rough And Tumble	10420	0.9	4.3₍₂₂₎	8.3₍₂₂₎	Apr 24₍₂₂₎	21	11
Sawtooth	9640	21.7	N/A	N/A	N/A	*	*
University Camp	10330	17.7	19.2	19.9	May 07	92	89
Wild Basin	9410	11.9	15.3₍₁₅₎	18.6₍₁₅₎	Apr 25₍₁₅₎	78	64
Willow Park	10710	15.7	17.5	21.0	Apr 29	90	75
Basin Index (%)		69
LARAMIE AND NORTH PLATTE RIVER BASINS
Arapaho Ridge	10960	15.2	22.4₍₁₈₎	25.2₍₁₈₎	May 01₍₁₈₎	68	60
Blackhall Mtn	9830	21.0	33.3₍₁₁₎	34.6₍₁₁₎	Apr 27₍₁₁₎	63	61
Columbine	9170	1.2	10.8	24.6	Apr 05	11	5
Deadman Hill	10240	11.8	18.5	21.8	May 04	64	54
Joe Wright	10140	17.7	22.4	24.0	May 05	79	74
Never Summer	10300	18.4	22.2₍₁₈₎	23.8₍₁₈₎	May 11₍₁₈₎	83	77
Rawah	9100	0.0	3.2₍₁₈₎	12.2₍₁₈₎	Apr 07₍₁₈₎	0	0
Roach	9710	3.1	14.6	17.5	Apr 25	21	18
Tower	10610	35.7	48.4	49.0	May 07	74	73
Whiskey Park	8950	17.1	26.0	30.8	Apr 17	66	56
Willow Creek Pass	9520	9.7	13.6	16.4	May 03	71	59
Zirkel	9320	1.1	18.8₍₁₈₎	28.5₍₁₈₎	Apr 07₍₁₈₎	6	4
Basin Index (%)		60
YAMPA AND WHITE RIVER BASINS
Battle Mountain	7460	0.0	0.0	12.6	Mar 27	*	0*
Bear River	9100	0.0	8.2₍₁₆₎	12.0₍₁₆₎	Apr 21₍₁₆₎	0	0
Bison Lake	10950	12.0	26.5	26.9	Apr 29	45	45
Buffalo Park	9240	4.1	10.3₍₂₅₎	14.9₍₂₅₎	Apr 14₍₂₅₎	40	28
Burro Mountain	9290	0.3	7.1	16.6	Apr 13	4	2
Columbine	9170	1.2	10.8	24.6	Apr 05	11	5
Crosho	8960	0.0	0.1	12.6	Apr 05	0*	0*
Divide Peak	8700	0.0	12.6	21.4	Apr 15	0	0
Dry Lake	8240	0.1	6.8	22.3	Apr 04	1	0
Elk River	8710	0.0	5.0	19.4	Apr 05	0	0
Elkhead Divide	8780	0.1	N/A	N/A	N/A	*	*
Little Snake River	8930	8.6	20.6₍₁₆₎	29.0₍₁₆₎	Apr 09₍₁₆₎	42	30
Lost Dog	9340	5.1	16.5₍₂₂₎	24.5₍₂₂₎	Apr 10₍₂₂₎	31	21
Lynx Pass	8910	0.2	0.0	11.5	Apr 04	*	2*
Old Battle	9850	26.2	37.2	38.8	May 05	70	68
Rabbit Ears	9390	9.8	20.8	27.9	Apr 21	47	35
Ripple Creek	10340	14.9	25.1	29.3	Apr 25	59	51
Sage Creek Basin	7830	0.0	0.0₍₁₉₎	14.8₍₁₉₎	Apr 03₍₁₉₎	*	0*
Sandstone RS	8150	0.2	0.6	14.2	Apr 05	33*	1*
Tower	10610	35.7	48.4	49.0	May 07	74	73
Trapper Lake	9750	0.1	N/A	N/A	N/A	*	*
Whiskey Park	8950	17.1	26.0	30.8	Apr 17	66	56
Basin Index (%)		48
ARKANSAS RIVER BASIN
Apishapa	10000	0.6	0.0	7.6	Mar 16	*	8*
Brumley	10570	-M	6.8	11.8	Apr 19	*	*
Fremont Pass	11310	17.7	19.6	20.8	May 11	90	85
Glen Cove	11410	2.5	3.8₍₁₆₎	5.7₍₁₆₎	Apr 23₍₁₆₎	66	44
Hayden Pass	10700	2.5	13.4₍₁₃₎	16.3₍₁₃₎	Apr 18₍₁₃₎	19	15
Medano Pass	9650	0.0	0.0₍₂₅₎	7.4₍₂₅₎	Mar 09₍₂₅₎	*	0*
Porphyry Creek	10790	9.5	9.4	17.0	Apr 15	101	56
Saint Elmo	10420	0.0	3.7₍₁₃₎	11.5₍₁₃₎	Apr 09₍₁₃₎	0	0
South Colony	10790	2.5	15.9₍₂₉₎	20.9₍₂₉₎	Apr 23₍₂₉₎	16	12
Ute Creek	10730	0.1	5.3₍₂₀₎	12.4₍₂₀₎	Apr 04₍₂₀₎	2	1
Whiskey Ck	10260	2.1	0.5	11.1	Apr 01	420*	19*
Basin Index (%)		52
UPPER RIO GRANDE BASIN
Beartown	11600	3.7	12.0	23.2	Apr 17	31	16
Cochetopa Pass	10020	0.0	0.0₍₁₆₎	4.8₍₁₆₎	Mar 29₍₁₆₎	*	0*
Culebra #2	10570	0.9	0.2	14.0	Apr 05	450*	6*
Cumbres Trestle	10030	0.3	14.2	26.2	Apr 06	2	1
Elwood Pass	11680	7.9	N/A	N/A	N/A	*	*
Grayback	11620	1.8	N/A	N/A	N/A	*	*
Hayden Pass	10700	2.5	13.4₍₁₃₎	16.3₍₁₃₎	Apr 18₍₁₃₎	19	15
Lily Pond	11060	0.3	3.0	14.8	Apr 04	10	2
Medano Pass	9650	0.0	0.0₍₂₅₎	7.4₍₂₅₎	Mar 09₍₂₅₎	*	0*
Middle Creek	11260	7.4	13.7	19.2	Apr 15	54	39
Moon Pass	11110	0.1	0.0₍₁₂₎	6.8₍₁₂₎	Apr 08₍₁₂₎	*	1*
North Costilla	10570	2.6	0.0	7.0	Mar 20	*	37*
Rat Creek	11680	3.9	N/A	N/A	N/A	*	*
San Antonio Sink	9120	0.1	N/A	N/A	N/A	*	*
Sargents Mesa	11490	0.2	8.2₍₁₂₎	11.4₍₁₂₎	Apr 13₍₁₂₎	2	2
Shuree	10080	0.6	0.0₍₁₀₎	6.0₍₁₀₎	Mar 08₍₁₀₎	*	10*
Slumgullion	11560	0.0	10.7	15.0	Apr 21	0	0
Trinchera	10850	0.2	0.2	11.2	Apr 05	100*	2*
Upper Rio Grande	9370	0.0	0.0	6.6	Mar 18	*	0*
Ute Creek	10730	0.1	5.3₍₂₀₎	12.4₍₂₀₎	Apr 04₍₂₀₎	2	1
Wager Gulch	11110	0.1	N/A	N/A	N/A	*	*
Wolf Creek Summit	10930	9.9	32.0	35.5	Apr 29	31	28
Basin Index (%)		26
SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASINS
Beartown	11600	3.7	12.0	23.2	Apr 17	31	16
Black Mesa	11580	16.6	N/A	N/A	N/A	*	*
Cascade	8900	-M	0.0	12.7	Mar 10	*	*
Cascade #2	8990	0.0	0.0	10.4	Mar 06	*	0*
Columbine Pass	9160	0.0	0.0	18.0	Mar 26	*	0*
Columbus Basin	10780	10.9	18.2₍₂₆₎	25.8₍₂₆₎	Apr 17₍₂₆₎	60	42
El Diente Peak	10210	0.0	0.2	14.6	Apr 04	0*	0*
Elwood Pass	11680	7.9	N/A	N/A	N/A	*	*
Lizard Head Pass	10190	0.0	4.6	15.2	Apr 05	0	0
Lone Cone	9730	0.0	0.0	15.2	Apr 01	*	0*
Mancos	10020	0.0	0.0₍₂₆₎	16.3₍₂₆₎	Mar 23₍₂₆₎	*	0*
Mineral Creek	10030	0.0	5.0	15.6	Apr 09	0	0
Molas Lake	10610	0.1	7.4	22.0	Apr 11	1	0
Red Mountain Pass	11050	14.6	20.6	25.0	Apr 25	71	58
Scotch Creek	9160	0.0	0.0	12.0	Mar 18	*	0*
Sharkstooth	10730	0.0	10.0₍₁₆₎	18.8₍₁₆₎	Apr 12₍₁₆₎	0	0
Spud Mountain	10660	0.1	11.2	25.6	Apr 04	1	0
Stump Lakes	11230	4.1	14.2	18.8	Apr 22	29	22
Upper San Juan	10140	0.0	19.8	29.7	Apr 09	0	0
Vallecito	10740	0.1	3.0	14.8	Apr 05	3	1
Weminuche Creek	10730	0.0	1.4₍₁₀₎	16.4₍₁₀₎	Mar 28₍₁₀₎	0*	0*
Wolf Creek Summit	10930	9.9	32.0	35.5	Apr 29	31	28
Basin Index (%)		27

-M = Missing data.
* = Analysis may not provide a valid measure of conditions.
N/A = Not available.

Footnotes for median and average:
(##) = If less than 30 years are available, this value specifies the number of years used for the median and average calculations.
Sites with less than 10 years available do not have medians or averages.

The snow water equivalent percent of median (or average) represents the current snow water
equivalent found at selected SNOTEL sites in or near the basin compared to the median (or average) value
for those sites on this day.

The snow water equivalent percent of median (or average) peak represents the current
snow water equivalent at selected SNOTEL sites in or near the basin compared to the median (or average)
of the maximum seasonal values observed each water year for those sites.

Contact your state water supply staff for assistance.

Medians and averages are calculated for the period 1991-2020.

Provisional data, subject to revision.
* Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median or average for the day is less than 10% of the maximum median or average value for the year.

* Basin - More than half of the stations for a basin with normals report missing or invalid data.

The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians or averages and the resulting fraction multiplied by 100.