CREATE TABLE table_16118 ("Year" FLOAT, "Division" FLOAT, "League" TEXT, "Regular Season" TEXT, "Playoffs" TEXT, "Open Cup" TEXT)

what being the maximum year where regular season is 4th, northwest
SELECT MAX("Year") FROM table_16118 WHERE "Regular Season" = '4th, Northwest'
SELECT MAX("Year") FROM "table_16118" WHERE "Regular Season" = '4th, Northwest'