Average GPS coordinates for Otter Postcode location: 45.09, -106.15. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Otter on map:

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Listing cities & postcodes (1):
>> Montana, 59062 Otter, Powder River, GPS coordinates: 45.0903,-106.1499