The International Network for Alpine Research Catchment Hydrology (INARCH) will be holding its 2026 annual workshop on September 8–10, 2026, at the University of Calgary Kananaskis Centre in Alberta, Canada (https://researchdirectory.ucalgary.ca/kananaskis-centre).  The workshop will include scientific presentations and discussion, and a tour of the Fortress Mountain Research Basin in Kananaskis, Alberta.  There will be several topics for this workshop, including: 

• Completing INARCH’s Common Observing Period Experiment (COPE); model trials at various sites, testing algorithms, various structures, forcing data and the need for dynamical downscaling or other solutions;
• Major advances in observing systems that we will want to document;
• Issues of how to upscale hydrological, cryosphere, and meteorological models from INARCH sites to regional products and predictions of various types; and
• Discussing renewal of INARCH as a Cross-Cutting project in GEWEX and priority science questions and themes.