As the outdoor industry leans on Utah, promising to yank the lucrative Outdoor Retailer trade shows out of Salt Lake City if the state’s leaders don’t abandon what industry captains call an “attack on the sanctity of public lands,” Denver is ramping up efforts to establish Colorado as the nation’s public-lands-loving epicenter for all things outdoors. Denver’s convention leaders are preparing bids to host the Outdoor Retailer summer and winter shows as well as Interbike, the nation’s largest bike trade show that is studying a move from its long-term home in Las Vegas. But Denver’s hosting of Outdoor Retailer’s winter shows could be hampered by the city’s contract with SnowSports Industries America’s Snow Show.