Follow road 4021 for 1.4 miles then bear left at the sign for the Ashland Lakes trailhead and proceed less than 1000 feet further to the parking area. Follow road 4020 for 2 3/4 miles then make a sharp right onto FSR # 4021, again signed for Ashland Lakes and Pinnacle Lake. ![]() Starting in the town of Granite Falls, drive east along the Mountain Loop Highway for 16 1/4 miles and turn right onto FSR # 4020, signed for Boardman Lake, Ashland Lakes and Pinnacle Lake. Location & DirectionsĮlevation: 2353 feet USGS Map: Mallardy Ridge 7 1/2" So ultimately Twin Falls is not at all an accurate name for this waterfall itself, but it would essentially be heresy to change it to anything else. We find this to be the most logical convention as well, since the linear distance between the two falls is considerable thanks to the presence of the lake. The USGS however only distinguishes the falls dropping into the lake as Twin Falls, instead of referring to them collectively as the name would suggest. ![]() Twin Falls Lake was named for the presence of waterfalls on Wilson Creek plunging both into and out of the lake. The naming of Twin Falls and its lake is almost a Chicken-or-Egg scenario. Twin Falls is the Official name of this waterfall. As such the falls are not really worth visiting after the end of July outside of heavy snow years. As it thundered downhill it carved a deep pothole in the bedrock and after the ice retreated and Wilson Creek took the place of the former river, it filled up the pothole forming tiny Twin Falls Lake, with the lacy veil of 138 foot Twin Falls plunging directly into it.īecause Wilson Creek is essentially fed by two small lakes and some swampland upstream from the falls, it will exhibit significant seasonal fluctuation in volume, ranging from a fairly powerful plunge during the spring to a very delicate plume in the autumn. Meltwater from the glacier lobe flowed south and scoured out a narrow notch in the valley. ![]() This plateau was formed thanks to a tongue of the Cordilleran Ice Sheet extending across the ridge during the last ice age. Wilson Creek drains from the Ashland Lakes, which occupy a flat(ish) plateau beween Mount Pilchuck and Bald Mountain south of the Mountain Loop Highway. Twin Falls is somewhat of a misnomer of a title for this waterfall.
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