United States, Minnesota, Washington, Lost Valley Prairie Scientific Natural Area. Washington Co. Lost Valley Prairie (MCBS-#5). Hastings. T27N R20W W1/2 SE1/4 NE1/4 of sec.29. SW-most bedrock hill of Lo Washington Co. Lost Valley Prairie (MCBS-#5). Hastings. T27N R20W W1/2 SE1/4 NE1/4 of sec.29. SW-most bedrock hill of Lost Valley; appx. 4 mi N Pt. Dougl.. 027N 20W 29