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, April 21, 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	10.3	12.0	13.7	Apr 08	86	75
Castle Peak	11500	25.0	N/A	N/A	N/A	*	*
Cochetopa Pass	10020	0.6	0.4₍₁₆₎	4.8₍₁₆₎	Mar 29₍₁₆₎	150*	12*
Columbine Pass	9160	0.0	9.6	18.0	Mar 26	0	0
Idarado	9780	7.4	10.9	14.4	Apr 06	68	51
Mc Clure Pass	8760	1.6	12.4	16.6	Apr 04	13	10
Mesa Lakes	10160	10.5	17.4	19.0	Apr 15	60	55
Overland Res.	9890	0.4	8.8	12.4	Apr 05	5	3
Park Cone	9600	7.2	9.0	10.4	Apr 09	80	69
Park Reservoir	9990	14.4	25.2	27.4	Apr 26	57	53
Porphyry Creek	10790	14.2	14.8	17.0	Apr 15	96	84
Rat Creek	11680	9.9	N/A	N/A	N/A	*	*
Red Mountain Pass	11050	19.8	23.3	25.0	Apr 25	85	79
Sargents Mesa	11490	6.1	10.2₍₁₂₎	11.4₍₁₂₎	Apr 13₍₁₂₎	60	54
Schofield Pass	10640	23.7	31.6	35.1	Apr 19	75	68
Slumgullion	11560	7.8	13.8	15.0	Apr 21	57	52
Upper Taylor	10710	7.0	11.9₍₁₁₎	13.6₍₁₁₎	Apr 03₍₁₁₎	59	51
Wager Gulch	11110	8.1	N/A	N/A	N/A	*	*
Basin Index (%)		62
UPPER COLORADO RIVER BASIN
Arapaho Ridge	10960	20.9	23.9₍₁₈₎	25.2₍₁₈₎	May 01₍₁₈₎	87	83
Bear River	9100	8.2	11.9₍₁₆₎	12.0₍₁₆₎	Apr 21₍₁₆₎	69	68
Beaver Ck Village	8530	7.5	6.7₍₁₇₎	11.7₍₁₇₎	Apr 02₍₁₇₎	112	64
Berthoud Summit	11300	20.7	20.8	23.2	May 03	100	89
Bison Lake	10950	17.8	24.6	26.9	Apr 29	72	66
Buffalo Park	9240	12.2	14.1₍₂₅₎	14.9₍₂₅₎	Apr 14₍₂₅₎	87	82
Castle Peak	11500	25.0	N/A	N/A	N/A	*	*
Chapman Tunnel	10090	10.4	15.1₍₁₃₎	15.4₍₁₃₎	Apr 19₍₁₃₎	69	68
Columbine	9170	18.3	21.3	24.6	Apr 05	86	74
Copper Mountain	10500	15.2	15.8	17.4	Apr 26	96	87
Elliot Ridge	10550	20.3	22.1₍₁₁₎	23.2₍₁₁₎	Apr 25₍₁₁₎	92	88
Fool Creek	11130	21.8	N/A	N/A	N/A	*	*
Fremont Pass	11310	18.3	18.6	20.8	May 11	98	88
Grizzly Peak	11110	18.6	18.6	19.6	Apr 21	100	95
High Lonesome	10630	18.5	N/A	N/A	N/A	*	*
Hoosier Pass	11600	14.4	16.8	17.3	Apr 27	86	83
Independence Pass	10570	13.5	15.6	17.4	Apr 18	87	78
Ivanhoe	10540	17.4	16.6₍₂₉₎	17.2₍₂₉₎	Apr 26₍₂₉₎	105	101
Jones Pass	10420	13.0	15.4₍₂₁₎	16.8₍₂₁₎	Apr 27₍₂₁₎	84	77
Kiln	9610	7.0	9.9	13.2	Apr 07	71	53
Lake Irene	10680	22.8	23.4	25.4	Apr 26	97	90
Lynx Pass	8910	0.3	7.8	11.5	Apr 04	4	3
Mc Clure Pass	8760	1.6	12.4	16.6	Apr 04	13	10
Mccoy Park	9500	9.3	11.8₍₁₈₎	14.6₍₁₈₎	Apr 07₍₁₈₎	79	64
Mesa Lakes	10160	10.5	17.4	19.0	Apr 15	60	55
Middle Fork Camp	8960	3.4	8.9₍₁₉₎	11.5₍₁₉₎	Apr 04₍₁₉₎	38	30
Nast Lake	8710	0.1	2.0	8.8	Mar 28	5	1
North Lost Trail	9190	8.4	11.2	17.4	Apr 04	75	48
Overland Res.	9890	0.4	8.8	12.4	Apr 05	5	3
Park Reservoir	9990	14.4	25.2	27.4	Apr 26	57	53
Phantom Valley	9030	6.4	7.0	10.4	Mar 30	91	62
Schofield Pass	10640	23.7	31.6	35.1	Apr 19	75	68
Stillwater Creek	8760	0.1	N/A	N/A	N/A	*	*
Summit Ranch	9350	5.2	9.8	11.4	Apr 09	53	46
Vail Mountain	10290	11.7	19.5	20.8	Apr 27	60	56
Willow Creek Pass	9520	14.2	14.7	16.4	May 03	97	87
Basin Index (%)		77
SOUTH PLATTE RIVER BASIN
Bear Lake	9490	16.8	18.4	19.8	Apr 27	91	85
Berthoud Summit	11300	20.7	20.8	23.2	May 03	100	89
Black Mountain	8950	8.4	11.7₍₁₀₎	12.5₍₁₀₎	Apr 17₍₁₀₎	72	67
Buckskin Joe	11160	9.2	11.3₍₂₁₎	12.6₍₂₁₎	May 02₍₂₁₎	81	73
Copeland Lake	8570	0.2	0.0	6.0	Mar 08	*	3*
Deadman Hill	10240	17.9	17.7	21.8	May 04	101	82
Echo Lake	10660	7.3	8.2₍₂₂₎	9.0₍₂₂₎	Apr 29₍₂₂₎	89	81
Hoosier Pass	11600	14.4	16.8	17.3	Apr 27	86	83
Hourglass Lake	9380	5.4	11.9₍₁₂₎	13.0₍₁₂₎	Apr 19₍₁₂₎	45	42
Jackwhacker Gulch	11030	10.4	13.2₍₂₂₎	14.4₍₂₂₎	Apr 25₍₂₂₎	79	72
Joe Wright	10140	22.6	22.0	24.0	May 05	103	94
Lake Eldora	9700	6.3	10.7	14.0	Apr 09	59	45
Lake Irene	10680	22.8	23.4	25.4	Apr 26	97	90
Long Draw Resv	9990	16.3	17.0₍₁₁₎	18.3₍₁₁₎	Apr 27₍₁₁₎	96	89
Loveland Basin	11410	20.9	21.2₍₂₈₎	24.4₍₂₈₎	May 02₍₂₈₎	99	86
Michigan Creek	10700	9.1	11.2₍₂₂₎	13.2₍₂₂₎	Apr 26₍₂₂₎	81	69
Niwot	9940	10.5	12.6	15.0	Apr 19	83	70
Rough And Tumble	10420	4.6	6.6₍₂₂₎	8.3₍₂₂₎	Apr 24₍₂₂₎	70	55
Sawtooth	9640	24.9	N/A	N/A	N/A	*	*
University Camp	10330	16.2	18.0	19.9	May 07	90	81
Wild Basin	9410	14.7	18.6₍₁₅₎	18.6₍₁₅₎	Apr 25₍₁₅₎	79	79
Willow Park	10710	17.7	18.6	21.0	Apr 29	95	84
Basin Index (%)		88
LARAMIE AND NORTH PLATTE RIVER BASINS
Arapaho Ridge	10960	20.9	23.9₍₁₈₎	25.2₍₁₈₎	May 01₍₁₈₎	87	83
Blackhall Mtn	9830	30.7	32.9₍₁₁₎	34.6₍₁₁₎	Apr 27₍₁₁₎	93	89
Columbine	9170	18.3	21.3	24.6	Apr 05	86	74
Deadman Hill	10240	17.9	17.7	21.8	May 04	101	82
Joe Wright	10140	22.6	22.0	24.0	May 05	103	94
Never Summer	10300	21.4	22.0₍₁₈₎	23.8₍₁₈₎	May 11₍₁₈₎	97	90
Rawah	9100	7.4	10.2₍₁₈₎	12.2₍₁₈₎	Apr 07₍₁₈₎	73	61
Roach	9710	12.4	16.4	17.5	Apr 25	76	71
Tower	10610	43.4	46.2	49.0	May 07	94	89
Whiskey Park	8950	26.2	26.6	30.8	Apr 17	98	85
Willow Creek Pass	9520	14.2	14.7	16.4	May 03	97	87
Zirkel	9320	18.7	25.6₍₁₈₎	28.5₍₁₈₎	Apr 07₍₁₈₎	73	66
Basin Index (%)		91
YAMPA AND WHITE RIVER BASINS
Battle Mountain	7460	0.6	5.5	12.6	Mar 27	11	5
Bear River	9100	8.2	11.9₍₁₆₎	12.0₍₁₆₎	Apr 21₍₁₆₎	69	68
Bison Lake	10950	17.8	24.6	26.9	Apr 29	72	66
Buffalo Park	9240	12.2	14.1₍₂₅₎	14.9₍₂₅₎	Apr 14₍₂₅₎	87	82
Burro Mountain	9290	9.2	14.0	16.6	Apr 13	66	55
Columbine	9170	18.3	21.3	24.6	Apr 05	86	74
Crosho	8960	5.4	9.0	12.6	Apr 05	60	43
Divide Peak	8700	13.4	19.3	21.4	Apr 15	69	63
Dry Lake	8240	15.5	18.8	22.3	Apr 04	82	70
Elk River	8710	10.9	15.0	19.4	Apr 05	73	56
Elkhead Divide	8780	13.1	N/A	N/A	N/A	*	*
Little Snake River	8930	21.3	24.0₍₁₆₎	29.0₍₁₆₎	Apr 09₍₁₆₎	89	73
Lost Dog	9340	18.2	21.8₍₂₂₎	24.5₍₂₂₎	Apr 10₍₂₂₎	83	74
Lynx Pass	8910	0.3	7.8	11.5	Apr 04	4	3
Old Battle	9850	30.4	33.5	38.8	May 05	91	78
Rabbit Ears	9390	22.5	25.6	27.9	Apr 21	88	81
Ripple Creek	10340	23.2	26.9	29.3	Apr 25	86	79
Sage Creek Basin	7830	1.9	6.2₍₁₉₎	14.8₍₁₉₎	Apr 03₍₁₉₎	31	13
Sandstone RS	8150	7.3	10.0	14.2	Apr 05	73	51
Tower	10610	43.4	46.2	49.0	May 07	94	89
Trapper Lake	9750	5.3	N/A	N/A	N/A	*	*
Whiskey Park	8950	26.2	26.6	30.8	Apr 17	98	85
Basin Index (%)		80
ARKANSAS RIVER BASIN
Apishapa	10000	0.6	0.4	7.6	Mar 16	150*	8*
Brumley	10570	7.8	10.8	11.8	Apr 19	72	66
Fremont Pass	11310	18.3	18.6	20.8	May 11	98	88
Glen Cove	11410	-M	5.1₍₁₆₎	5.7₍₁₆₎	Apr 23₍₁₆₎	*	*
Hayden Pass	10700	2.6	13.9₍₁₃₎	16.3₍₁₃₎	Apr 18₍₁₃₎	19	16
Medano Pass	9650	1.0	0.0₍₂₅₎	7.4₍₂₅₎	Mar 09₍₂₅₎	*	14*
Porphyry Creek	10790	14.2	14.8	17.0	Apr 15	96	84
Saint Elmo	10420	4.6	10.4₍₁₃₎	11.5₍₁₃₎	Apr 09₍₁₃₎	44	40
South Colony	10790	8.9	19.3₍₂₉₎	20.9₍₂₉₎	Apr 23₍₂₉₎	46	43
Ute Creek	10730	1.1	11.0₍₂₀₎	12.4₍₂₀₎	Apr 04₍₂₀₎	10	9
Whiskey Ck	10260	0.5	8.1	11.1	Apr 01	6	5
Basin Index (%)		56
UPPER RIO GRANDE BASIN
Beartown	11600	13.3	20.2	23.2	Apr 17	66	57
Cochetopa Pass	10020	0.6	0.4₍₁₆₎	4.8₍₁₆₎	Mar 29₍₁₆₎	150*	12*
Culebra #2	10570	2.3	10.6	14.0	Apr 05	22	16
Cumbres Trestle	10030	9.9	22.5	26.2	Apr 06	44	38
Elwood Pass	11680	13.1	N/A	N/A	N/A	*	*
Grayback	11620	1.4	N/A	N/A	N/A	*	*
Hayden Pass	10700	2.6	13.9₍₁₃₎	16.3₍₁₃₎	Apr 18₍₁₃₎	19	16
Lily Pond	11060	1.0	10.4	14.8	Apr 04	10	7
Medano Pass	9650	1.0	0.0₍₂₅₎	7.4₍₂₅₎	Mar 09₍₂₅₎	*	14*
Middle Creek	11260	12.8	17.8	19.2	Apr 15	72	67
Moon Pass	11110	1.0	4.4₍₁₂₎	6.8₍₁₂₎	Apr 08₍₁₂₎	23	15
North Costilla	10570	0.1	1.4	7.0	Mar 20	7	1
Rat Creek	11680	9.9	N/A	N/A	N/A	*	*
San Antonio Sink	9120	0.1	N/A	N/A	N/A	*	*
Sargents Mesa	11490	6.1	10.2₍₁₂₎	11.4₍₁₂₎	Apr 13₍₁₂₎	60	54
Shuree	10080	0.1	0.0₍₁₀₎	6.0₍₁₀₎	Mar 08₍₁₀₎	*	2*
Slumgullion	11560	7.8	13.8	15.0	Apr 21	57	52
Trinchera	10850	2.0	8.2	11.2	Apr 05	24	18
Upper Rio Grande	9370	0.1	0.3	6.6	Mar 18	33*	2*
Ute Creek	10730	1.1	11.0₍₂₀₎	12.4₍₂₀₎	Apr 04₍₂₀₎	10	9
Wager Gulch	11110	8.1	N/A	N/A	N/A	*	*
Wolf Creek Summit	10930	15.6	31.7	35.5	Apr 29	49	44
Basin Index (%)		44
SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASINS
Beartown	11600	13.3	20.2	23.2	Apr 17	66	57
Black Mesa	11580	17.3	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	9.6	18.0	Mar 26	0	0
Columbus Basin	10780	15.2	23.6₍₂₆₎	25.8₍₂₆₎	Apr 17₍₂₆₎	64	59
El Diente Peak	10210	7.1	10.0	14.6	Apr 04	71	49
Elwood Pass	11680	13.1	N/A	N/A	N/A	*	*
Lizard Head Pass	10190	8.5	13.4	15.2	Apr 05	63	56
Lone Cone	9730	0.2	8.2	15.2	Apr 01	2	1
Mancos	10020	0.5	8.2₍₂₆₎	16.3₍₂₆₎	Mar 23₍₂₆₎	6	3
Mineral Creek	10030	7.2	12.7	15.6	Apr 09	57	46
Molas Lake	10610	9.7	19.6	22.0	Apr 11	49	44
Red Mountain Pass	11050	19.8	23.3	25.0	Apr 25	85	79
Scotch Creek	9160	0.0	2.3	12.0	Mar 18	0	0
Sharkstooth	10730	5.4	17.7₍₁₆₎	18.8₍₁₆₎	Apr 12₍₁₆₎	31	29
Spud Mountain	10660	6.7	20.3	25.6	Apr 04	33	26
Stump Lakes	11230	11.3	17.5	18.8	Apr 22	65	60
Upper San Juan	10140	7.0	27.4	29.7	Apr 09	26	24
Vallecito	10740	3.4	12.2	14.8	Apr 05	28	23
Weminuche Creek	10730	1.0	10.3₍₁₀₎	16.4₍₁₀₎	Mar 28₍₁₀₎	10	6
Wolf Creek Summit	10930	15.6	31.7	35.5	Apr 29	49	44
Basin Index (%)		46

-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.