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DTSTART;TZID=Europe/London:20260725T150000
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UID:10000152-1784991600-1785000600@www.cornwallheritagetrust.org
SUMMARY:Rescheduled - Trig Points and Tregonning Hill Guided Walk
DESCRIPTION:Due to unforeseen circumstances\, this event has been rescheduled and is now taking place in July. For those already booked onto this event\, please check your email for further updates. Thank you.\nApril 2026 marks 90 years since trig pillars were first used in the retriangulation of Great Britain. To celebrate\, join us for a guided walk to a primary trig point on Tregonning Hill\, exploring this hill’s role in early modern mapping and its much older history as a place of settlement and defence.  \nDate: Saturday 25th July (rescheduled date)\nTime: 3.00pm – 5.30pm \nLocation: Tregonning Hill\, Balwest\, Helston\, TR13 9TE – What3Words: ///grain.surpasses.good \nMeeting point: Balwest Chapel Car Park\, TR13 9TE – What3Words: ///perkily.table.dolls\n \nPrice: £10 per person \nTrig points were positioned so they could be clearly seen from one another. From Tregonning Hill\, there is a direct sight-line to a trig point on Castle an Dinas (West)\, another important site in Cornwall Heritage Trust’s care.  \nIf the weather is clear\, we should be able to see this concrete pillar. These inter-visible sites would have worked together to help Ordnance Survey surveyors create accurate maps of the surrounding landscape. \nAlong the walk\, we’ll consider how trig pillars were used\, why Tregonning was chosen as a survey site\, and how the hill has been important for thousands of years\, including during prehistory when it was used for its long-distance visibility. \nThe walk will be led by Cornwall Heritage Trust’s Sites Project Manager\, Carolyn Kennett. \n\nAccessibility and terrain\nThe route is on established paths\, however there is rough\, uneven ground with steep sections. Sturdy footwear and appropriate clothing are essential. \nThere is a toilet available near the site. \n\nThis event is in aid of Cornwall Heritage Trust – the independent charity protecting Cornwall’s heritage for everyone.
URL:https://www.cornwallheritagetrust.org/event/trig-points-and-tregonning-hill-guided-walk-2026/
LOCATION:Tregonning Hill\, Tregonning Hill\, Helston\, TR13 9TE\, United Kingdom
CATEGORIES:Guided Walks
ATTACH;FMTTYPE=image/jpeg:https://www.cornwallheritagetrust.org/wp-content/uploads/2026/01/CHT-TrigPointsWalk-TregonningHill-scaled.jpg
ORGANIZER;CN="Cornwall Heritage Trust":MAILTO:tickets@cornwallheritagetrust.org
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