The National Park Authority owns very little land in the National Park and so the answer must be that you must get the permission of the landowner first. The Park Authority appreciate that people can develop a great attachment for particular places within Eryri.
The National Park Authority would not be in favour of anything which changes the natural ecosystem in areas of conservation interest. Approximately 29% of Eryri is designated for its special scientific significance and requests within SSSI and NNR sites would require consultation.
The National Park Authority leases an area of land on the summit of Yr Wyddfa from the Welsh Government. Given the high numbers of walkers there can also be a distinct lack of privacy for what can be a sensitive activity for a family, and it can also upset and inconvenience others.
This is a very small area geographically and has naturally low-acid soils, therefore, adding additional and chemically dissimilar material can have a cumulative and adverse effect on the surrounding soils and vegetation. Ashes also have high pH and sodium levels. The cautionary note regarding areas of conservation interest still applies.
The National Park Authority is not in favour of memorial stones, plaques or benches as they can detract from the feeling of wildness that many people come to enjoy. However, certain formally managed sites may be suitable and while the Park Authority do not have any suitable areas, the National Trust or Natural Resources Wales may be able to assist. Please consider other alternatives, such as planting a tree or making a donation to organisations that care for the area — including the National Park, the National Trust, the Woodland Trust, the Snowdonia Society, and many others who help maintain Eryri’s unique landscape.
Any plaques or memorials placed on Yr Wyddfa will be removed.