The Twin Peaks/Goose Creek Cooperative Wildlife Management Unit (CWMU) is the Twin Peaks CWMU with an extension to the Nevada and Idaho state-lines. Twin Peaks remains the highest elevation, around 8500 feet, now in the northwest corner elevation can reach 5300 feet. In the southwest the elevation reaches up to 7200 feet on Mountain Butte. More of Hardestry Creek is included with the extension, now Hardestry Creek ranges from 5300 feet to 7400 feet. In the north of the extension Goose Creek flows at about 5000 feet elevation. In the south Meadow Creek forms a great part of the south boundary, ranging from 5400 feet to 6000 feet. The most common elevation is 6800 feet but ranges from 5600 feet to 8500 feet with an elevation difference of 2900 feet. Fifty percent (50%) of the CWMU elevation ranges between 6700 feet and 7700 feet an elevation difference of 1000 feet.The eastern side of the Twin Peaks/Goose Creek Cooperative Wildlife Management Unit (CWMU) is dominated by Inter-Mountain Basins Montane Sagebrush Steppe (62) land cover. The western side is dominated by Inter-Mountain Basins Big Sagebrush Shrubland (48). Particularly, on the western side are large areas of Great Basins Pinyon-Juniper Woodland (37). There are patches of Inter-Mountain Basins Semi-Desert Grassland (76) and Agriculture
(114) on the western side. One of the Twin Peaks - Goose Creek Cooperative Wildlife Mangement Unit (CWMU) nearest weather stations, GROUSE CREEK (423486), is about 9.3 km south from the south edge of the CWMU. GROUSE CREEK has forty-nine (49) years of records, 1959 - 2008. During the FALL (September, October and November) the average precipitation is 2.25 inches, but it can be as high as 4.42 inches or as low as 0.60 inch. During the 91-day FALL period, 16 days will experience greater than or equal to 0.01 inch of precipitation, 7 days of greater than or equal to 0.10 inch, or 1 day of the greater than or equal to 0.50 inch of precipitation. Snowfall during the FALL averages 3.6 inches but can be as high as 21.0 inches. FALL temperature at GROUSE CREEK averages 46.0 degrees F. but can be as high as 97.0 degrees F. or as low as -12.0 degrees F. During the FALL, 54 days will be below freezing (32 degrees F.) and 1 day above 90 degrees F.
