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Stream
1st-2nd order or <30 miles long |
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Stream 3rd-5th order or 30 - 100 miles long |
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River
>5th order or >100 miles long |
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| |
River >5th order and >200 miles long and a direct tributary
to the Missouri River (Milk or Marias Rivers) |
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The
Missouri River downstream from Great Falls |
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Ecoregions are based on Omernik’s Level III Ecoregion delineations (see Woods, A.J. et al. 2002. Ecoregions of Montana. 2nd edition poster). The Northern Glaciated Plains Ecoregion is the Northwestern Glaciated Plains Level III Ecoregion (#42).
