6 climbers missing on Mount Rainier

[Divernan]

5. Lead guide for missing climbers was Matt Hegeman

From my link above:
The lead guide for the missing climbers is Matt Hegeman, Alpine Ascents confirmed this afternoon.

He checked in with the company on Tuesday, saying the whole crew made it to Thumb Rock at about 10,700 feet, according to an Alpine Ascents blog post. Then on Wednesday, the group said by phone they reached 12,800 feet and planned to camp for the evening. They have reportedly not made contact since. (An earlier Today File post incorrectly said this group turned around at 13,000 feet due to bad weather.)

Hegeman lives in California according to his Facebook page. He has climbed Mount Rainier 50-plus times on four different routes, according to his bio on the Alpine Ascents website.

This link also has a map.http://blogs.seattletimes.com/today/2014/05/six-climbers-missing-on-mount-rainier/