The SiEntries link for the Slioch Race (Sunday 14th June) is open - 

SiEntries - Slioch Horseshoe Hill Race

Note the race date change from what is held in the .pdf 2026 race date calendar. The race is confirmed as Sunday 14th June so as not to clash with the Celtman which is taking place on Saturday the 13th of June and to avoid congestion in Kinlochewe.