The four climbers were members of a Latvian mountaineering expedition. DENALI PARK, Alaska — Three climbers on Alaska’s Mount McKinley who fell near a treacherous pass on North America’s tallest peak have died, a Latvian mountaineering group announced Friday. A fourth climber was rescued. The four were members of a Latvian mountaineering expedition, the group said. They were part of a seven-person team traversing a route known for its exposed sections — where many injuries and deaths have occurred over the years — when they fell Wednesday, the National Park Service has said. McKinley stands at about 20,310 feet (6,190…