Cruise West, now the only cruise operator on the river, is extending the Columbia & Snake Rivers cruise season through the summer with a new itinerary on the Spirit of '98. As bookings for the river itineraries continue to rise, Cruise West will stay and operate a new summer itinerary rather than send the Spirit of '98 to for the summer season. Cruise West's new, seven-night "Best of the Columbia & Snake Rivers" itinerary will cruise round-trip out of Portland, OR and highlight the native culture, cuisine and history of the region, with tours of the Tamastslikt Culture Institute, Mt. St. Helens and two boutique wineries. Additionally…