Bialystok, Podlaskie Voivodeship (Poland) - "PKO Bialystok Half Marathon". The Bialystok Half Marathon is the biggest running event in the eastern Poland. Bialystok is the largest city in northern-eastern Poland and the capital of the Podlaskie Voivodeship with a population of 300,000. It is located in the area called the Green Lungs of Poland. Approximately 32% of its area is green. Parks and squares, as well as 1,800 hectares of forests within the city limits, create a unique and healthy microclimate. Within the city, there are two nature reserves with a total surface area of 105 hectares. The municipal agglomeration neighbours the Narew National Park. The close proximity of nature reserves to an urban area is part of the city. www.bialystokpolmaraton.pl