From LOS your best bets would either be heading south or west to get away from the downtown traffic. I'm not too familiar with a western route, but http://www.mapmyride.com/routes/view/74414934/ is a route going to the south. It's not the most scenic route, but I've ridden much of it. You mentioned 40+, but I came in at 39. You can easily add a few more miles to it by taking a turn or two off Mann Road.