CREATE TABLE table_37259 ("Name" TEXT, "Number" FLOAT, "From" TEXT, "Length  ( km ) " FLOAT, "Length  ( mi ) " FLOAT)

What's the shortest length from north klondike highway that has a length less than 326?
SELECT MIN("Length (km)") FROM table_37259 WHERE "Name" = 'north klondike highway' AND "Length (mi)" < '326'
SELECT MIN("Length (km)") FROM "table_37259" WHERE "Length (mi)" < '326' AND "Name" = 'north klondike highway'