CREATE TABLE table_25058269_1 (season VARCHAR2, runner_up VARCHAR2)

In which season is the runner-up Lase-R/Riga?
SELECT season FROM table_25058269_1 WHERE runner_up = "Lase-R/Riga"
SELECT "season" FROM "table_25058269_1" WHERE "Lase-R/Riga" = "runner_up"