NO DOGS ARE ALLOWED IN THE FOLLOWING AREAS (INCLUDING THE TRAILS ACCESSING THESE AREAS): 
* WENATCHEE RIVER - EIGHTMILE AND CAROLINE LAKES, 
* ENCHANTMENT LAKES BASIN, 
* SNOW LAKES TRAIL #1553, 
* STUART LAKE, 
* COLCHUCK LAKE, 
* HEADLIGHT BASIN & INGALLS LAKE, 
* LONGS PASS, 
* HEAD OF INGALLS CREEK ABOVE THE TURNPIKE JUNCTION (EXCEPT FOR 50 FT. CORRIDOR ALONG THE INGALLS CREEK TRAIL #1215 WHERE DOGS ARE ALLOWED).


DOGS MUST BE LEASHED ON THE FOLLOWING TRAILS: 
* NORTH BEND - COMMONWEALTH BASIN #1033, 
* DENNY CREEK #1014, 
* GRANITE MOUNTAIN #1016, 
* HIGH LAKES #1012, 
* KALEETAN LAKE #1010, 
* MASON LAKES #1038, 
* MELAKWA LAKE #1011, 
* MT. DEFIANCE #1009, 
* PACIFIC CREST FROM SNOQUALMIE PASS TO DISTRICT BOUNDARY #2000, 
* PRATT LAKE #1007, 
* SNOW LAKE #1013, 
* TALAPUS LAKE #1039, 
* THOMPSON LAKE #1009.01. 
* SKYKOMISH - WEST FORK FOSS #1064, 
* NECKLACE VALLEY #1062, 
* SURPRISE CREEK #1060, 
* TONGA RIDGE #1058, 
* LAKE DOROTHY #1072. 
* CLE ELUM - BOX CANYON #1313, 
* LAKE LILLIAN #1332, 
* GOLD CREEK #1314. 

Source:
http://www.wilderness.net/index.cfm?fuse=NWPS&sec=wildView&WID=8&tab=Area%20Management