(Thanks to Elio Ramos and Reynaldo Barrety from Puerto Rico for the provided photos)

San Blas Half Marathon (Coamo, Puerto Rico) 1976. The leaders: Luis Pinzón (204) from Colombia, (220) from England, (¿¿??) Miruts
Yifter (21) from Ethiopia, Rafael Angel Perez (207) from Costa Rica. Behind Luis Pinzón, to his right Lasse Viren from Finland
and to his left Jack Foster from New Zealand. Perez won the race (1:03:46). Victor Mora from Colombia second (1:04:17), Jack
Foster third (1:04:30), Luis Pinzón fourth (1:04:36) and Lasse Viren sixth (1:05:27).

San Blas Half Marathon (Coamo, Puerto Rico) 1976. Later in the race: Rafael Angel Perez, Luis Pinzón and Victor Mora
from Colombia

San Blas Half Marathon (Coamo, Puerto Rico) 1977. The leaders: Ethiopians Miruts Yifter (20) and Mohammed Kedir (21)
followed by the Kenyan Henry Rono (23). Yifter won the race with 1:02:56, Kedir finished second 1:04:05 and Rono in the
fourth 1:04:56. In the third place arrived Jack Foster (not shown) from New Zealand.

San Blas Half Marathon (Coamo, Puerto Rico) 1984. The leaders: Zacaria Barie (25) and Gidamis Shahanga (26) from Tanzania,
and Mike Musyoki from Kenya. Hardly seen in the back is Marti Vainio from Finland. Barie won the race in 1:04:53, Shahanga
second in 1:05:12 and Musyoki third in 1:05:35. Vainio finished 31th with 1:12:06

San Blas Half Marathon (Coamo, Puerto Rico) 1986. The leaders from left to right: Brian Sheriff from Zimbabwe, Martin
Pitayo from Mexico, Gidamis Shahanga from Tanzania. Ibrahim Hussein from Kenya, Mohamed Kedir from Ethiopia, Mike Musyoki
from Kenya, Zacharia Barie from Tanzania, Jose Elias de Jesus and Silvio Salazar from Colombia.
Sheriff won the race with 1:04:03, Musyoki second, Shahanga third, Kedir fourth, Barie fifth, Pitayo eighth, Hussein ninth, and Silvio Salazar 31th.