Cascade Endurance
Cascade Endurance offers fully individualized coaching, as well as training plans and resources for all skiers, trail runners, and all manner of mountain athletes. Coach-owners Sam and Alison Naney are also the race organizers for the Loup Loup Skimo Race!
Skin track training articles
Many resources from Stano at skintrack.com on skimo training
Uphill athlete
Articles and paid training plans from mountain athletes Scott Johnston and Steve House
Training Cadence for Skimo Racing
Importance of cadence during uphill from Patrick Fink
Training for skimo off snow
La Sportiva Athlete John Gaston
Videos:
USSMA Learning Center
Collection of videos put together by USSMA. Series from Boulder Nordic Sports about skimo skins and from COSMIC about transitions.