CREATE TABLE table_204_25 (id DECIMAL, "rank" DECIMAL, "mountain peak" TEXT, "mountain range" TEXT, "elevation" TEXT, "prominence" TEXT, "isolation" TEXT, "location" TEXT)

which mountain peak is the only mountain peak in the cascade range ?
SELECT "mountain peak" FROM table_204_25 WHERE "mountain range" = 'cascade range'
SELECT "mountain peak" FROM "table_204_25" WHERE "mountain range" = 'cascade range'