Hydrographic Regions and Basins

Washoe
	Region	Basin	Sq Miles	Acres	Hydrographic Basin/Sub-Basin Name	Counties	Nearest Cities	Designated
		Total	110,545	70,748,800	Square miles/acres
[1] NORTHWEST REGION (Hydrographic Region 1)
4	1	4	494	316160	Virgin Valley	Humboldt; Washoe	Denio	No
6	1	6	147	94080	Guano Valley	Washoe; Humboldt	Denio; Vya	No
7	1	7	226	144640	Swan Lake Valley	Washoe; Humboldt	Denio	No
8	1	8	176	112640	Massacre Lake Valley	Washoe	Vya; Cedarville	No
9	1	9	433	277120	Long Valley	Washoe	Vya; Cedarville	No
10	1	10	27	17280	Macy Flat	Washoe	Vya	No
11	1	11	51	32640	Coleman Valley	Washoe	Vya	No
12	1	12	32	20480	Mosquito Valley	Washoe	Vya	No
13	1	13	82	52480	Warner Valley	Washoe	Vya	No
14	1	14	214	136960	Surprise Valley	Washoe	Vya; Cedarville	No
15	1	15	88	56320	Boulder Valley	Washoe	Vya; Cedarville	No
16	1	16	533	341120	Duck Lake Valley	Washoe	Gerlach	No
		Total	3,052	1,953,280	Square miles/acres
[2] BLACK ROCK DESERT REGION (Hydrographic Region 2)
17	2	17	12	7680	Pilgrim Flat	Washoe	Gerlach	No
18	2	18	31	19840	Painter Flat	Washoe	Gerlach	No
19	2	19	39	24960	Dry Valley	Washoe	Gerlach; Sutcliffe	No
20	2	20	12	7680	Sano Valley	Washoe	Sano; Smoke Creek	No
21	2	21	980	627200	Smoke Creek Desert	Washoe	Gerlach; Smoke Creek	No
22	2	22	305	195200	San Emidio Desert	Washoe; Pershing	Empire; Gerlach	Yes
23	2	23	9	5760	Granite Basin	Washoe	Gerlach	No
24	2	24	315	201600	Hualapai Flat	Washoe; Humboldt; Pershing	Gerlach	Yes
25	2	25	665	425600	High Rock Lake Valley	Washoe; Humboldt	Vya; Gerlach	No
28	2	28	2179	1394560	Black Rock Desert	Humboldt; Pershing; Washoe	Sulfur; Jungo; Summit Lake	Yes
		Total	8,632	5,524,480	Square miles/acres
[5] WEST CENTRAL REGION (Hydrographic Region 5)
79	5	76	120	76800	Fernley Area	Lyon; Washoe; Storey; Churchill	Fernley; Hazen	Yes
		Total	1,656	1,059,840	Square miles/acres
[6] TRUCKEE RIVER REGION (Hydrographic Region 6)
83	6	80	371	237440	Winnemucca Lake Valley	Pershing; Washoe; Churchill	Nixon; Gerlach	No
84	6	81	672	430080	Pyramid Lake Valley	Washoe; Churchill	Nixon; Sutcliffe	No
85	6	82	92	58880	Dodge Flat	Washoe; Churchill	Wadsworth	No
86	6	83	285	182400	Tracy Segment	Storey; Washoe; Lyon	Sparks; Fernley	Yes
87	6	84	247	158080	Warm Springs Valley	Washoe	Sparks	Yes
88	6	85	76	48640	Spanish Springs Valley	Washoe	Sparks; Reno	Yes
89	6	86	10	6400	Sun Valley	Washoe	Sun Valley; Sparks	Yes
90	6	87	203	129920	Truckee Meadows	Washoe; Storey	Reno; Sparks	Yes
91	6	88	39	24960	Pleasant Valley	Washoe	Reno; Washoe City	Yes
92	6	89	82	52480	Washoe Valley	Washoe	Washoe City	Yes
93	6	90	139	88960	Lake Tahoe Basin	Douglas; Washoe; Carson City	Incline Village; Glenbrook; Stateline	Yes
94	6	91	84	53760	Truckee Canyon Segment	Washoe	Verdi	Yes
		Total	2,300	1,472,000	Square miles/acres
[7] WESTERN REGION (Hydrographic Region 7)
95	7	92A	53	33920	Lemmon Valley/Western Part	Washoe	Lemmon Valley; Reno	Yes
96	7	92B	40	25600	Lemmon Valley/Eastern Part	Washoe	Lemmon Valley; Reno	Yes
97	7	93	18	11520	Antelope Valley	Washoe	Lemmon Valley; Sparks	Yes
98	7	94	53	33920	Bedell Flat	Washoe	Lemmon Valley	Yes
99	7	95	80	51200	Dry Valley	Washoe	D0Yle	No
100	7	96	9	5760	Newcomb Lake Valley	Washoe	Doyle	No
101	7	97	193	123520	Honey Lake Valley	Washoe	Flanigan; Doyle	Yes
102	7	98	43	27520	Skedaddle Creek Valley	Washoe	Smoke Creek; Doyle	No
103	7	99	58	37120	Red Rock Valley	Washoe	Bordertown; Lemmon Valley	Yes
104	7	100	30	19200	Cold Springs Valley	Washoe	Bordertown; Lemmon Valley	Yes
105	7	100A	25	16000	Cold Springs Valley/Long Valley	Washoe	Bordertown	Yes
		Total	602	385,280	Square miles/acres