Guajará-Mirim is a municipality

Municipality

A municipality is essentially an urban administrative division having corporate status and usually powers of self-government. It can also be used to mean the governing body of a municipality. A municipality is a general-purpose administrative subdivision, as opposed to a special-purpose district...

 in the Brazil

Brazil

Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

ian state of Rondônia

Rondônia

Rondônia is a state in Brazil, located in the north-western part of the country. To the west is a short border with the state of Acre, to the north is the state of Amazonas, in the east is Mato Grosso, and in the south is Bolivia. Its capital is Porto Velho. The state was named after Candido Rondon...

. It is located at an altitude

Altitude

Altitude or height is defined based on the context in which it is used . As a general definition, altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The reference datum also often varies according to the context...

 of 128 meters. Its population was 41,467 (2005) and its area is 24,856 km².

It lies along the Mamoré River, just across the Bolivia

Bolivia

Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

n border town of Guayaramerín

Guayaramerín

Guayaramerín is a city within the Bolivian Beni Department. It is the capital of the Guayaramerín Municipality in the Vaca Díez Province. Guayaramerín is located on the left side of Mamoré River, facing the Brazilian city of Guajará-Mirim. It is a port in which there is a permanent port of the...

. It was once the southern terminus of the Estrada de Ferro Madeira-Mamoré (the Madeira-Mamoré Railway), which was inaugurated in 1912. It is the seat of the Roman Catholic Diocese of Guajará-Mirim

Roman Catholic Diocese of Guajará-Mirim

The Roman Catholic Diocese of Guajará-Mirim is a diocese located in the city of Guajará-Mirim in the Ecclesiastical province of Porto Velho in Brazil.-History:...

.