Rope team climbs snow slope en route to summit
Mount Sidley / © Dylan Taylor
Rope team climbs a rocky ridge above Weiss Amphitheater
Mount Sidley / © Dylan Taylor
Arriving back at Mount Sidley base camp
Mount Sidley / © Scott Woolums
Cresting the summit ridge of Mount Sidley
Mount Sidley / © Scott Woolums
Climbers pass snow features on rim of caldera
Mount Sidley / © Dylan Taylor
Heading toward the summit of Mount Sidley
Mount Sidley / © Scott Woolums
Climbing team travels roped together on the summit ridge
Mount Sidley / © Tre-C Dumais
Climbers navigate through enormous snow mushrooms
Mount Sidley / © Tre-C Dumais
ALE's Basler at Mount Sidley base camp
Mount Sidley / © Tre-C Dumais
Climber stands next to massive snow mushroom on summit ridge
Mount Sidley / © Tre-C Dumais
Frosty climbing boot and crampon on Mount Sidley
Mount Sidley / © Tre-C Dumais
Snow covered Hilleberg tent on Mount Sidley
Mount Sidley / © Tre-C Dumais
Climbers set off from base camp with skis and sleds
Mount Sidley / © Scott Woolums
Ski approach with sleds, to the base of Mount Sidley
Mount Sidley / © Scott Woolums
High camp for ascent of Sidley's East Ridge
Mount Sidley / © Scott Woolums
Skiing up the lower slopes of Mount Sidley with sleds
Mount Sidley / © Scott Woolums
Flight to Mount Sidley in the Basler BT-67 aircraft
Mount Sidley / © Scott Woolums
Leaving high camp to climb Sidley's East Ridge
Mount Sidley / © Scott Woolums
Mount Sidley summit and caldera
Mount Sidley / © Scott Woolums
Mount Sidley 14,058 ft (4285 m) is Antarctica's highest volcano
Mount Sidley / © Russ Hepburn
Guides Alex A. and Scott W. on the summit
Mount Sidley / © Scott Woolums
Snow walls protect tents from strong winds at base camp
Mount Sidley / © Russ Hepburn
Roped travel past snow rime 'mushrooms' on summit ridge
Mount Sidley / © Scott Woolums
Base camp in Mount Sidley's caldera
Mount Sidley / © Russ Hepburn
Climbing team on the summit of Mount Sidley
Mount Sidley / © Scott Woolums
ALE Guide Scott W. on the summit ridge
Mount Sidley / © Scott Woolums
Satellite image of Mount Sidley and Mount Waesche
Mount Sidley / © USGS Antarctic Interactive Research Atlas
