Zipcar, the world’s largest car-sharing service, is making it easier than ever to experience the natural beauty surrounding Portland, Ore. Forty Portland-based Zipcars are now outfitted with either Northwest Forest or Oregon State Park access passes (10 vehicles have both). Anyone with a Zipcar account (easy to set up online) can reserve the pass-equipped cars on a first-come, first-served basis. Zipcar has placed the passes in all Honda Elements, Subaru Outbacks and Honda CRVs, as well as in some Subaru Imprezas. To view which Zipcars have passes, click on the vehicle’s online description and check out its amenities, which also include iPod adapters and bike racks.