Miguel Sucunza was a prominent Navarrese runner, originally from Leitza (Leiza), who developed his athletic career mainly 1947 and 1952. Although born in Navarre, he always competed representing the Gipuzkoan federation, which reflects the close ties the area's athletes and the Gipuzkoan sporting community.
During his most active period, Sucunza established himself as one of the most notable runners of his generation in the Basque Country and Navarre, participating in numerous popular races and traditional challenges of the time. His name is linked to the rise of Basque rural athletics in the mid-20th century, a period in which long-distance races and inter-village sports betting were a fundamental part of local culture.
Miguel Sucunza is still remembered in Leitza as an example of dedication to sport and commitment to his homeland.