SELECT "track" FROM table_204_630 WHERE "winner" = 'ricky stenhouse, jr' INTERSECT SELECT "track" FROM table_204_630 WHERE "winner" = 'justin allgaier'
ricky stenhouse , jr. and justin allgaier both won at which track this season ?
CREATE TABLE table_204_630 (
    id number,
    "no" number,
    "date" text,
    "race" text,
    "track" text,
    "winner" text,
    "reports" text
)