Mont. Code Ann. § 70-18-203
Islands and accumulations of land formed in the beds of streams which are navigable belong to the state if there is no title or prescription to the contrary.
History: En. Sec. 1403, Civ. C. 1895; re-en. Sec. 4575, Rev. C. 1907; re-en. Sec. 6822, R.C.M. 1921; Cal. Civ. C. Sec. 1016; Field Civ. C. Sec. 445; re-en. Sec. 6822, R.C.M. 1935; R.C.M. 1947, 67-1304.