CREATE TABLE table_203_475 (id NUMBER, "stage" NUMBER, "date" CLOB, "route" CLOB, "terrain" CLOB, "length" CLOB, "winner" CLOB)

which routes were at least 100 km ?
SELECT "route" FROM table_203_475 WHERE "length" >= 100
SELECT "route" FROM "table_203_475" WHERE "length" >= 100