A multi-agency plea has been made for people to be more considerate and take home litter from beauty spots to avoid a repeat of recent “shameful” scenes.
Forestry and Land Scotland (FLS) says while many car parks and attractions are now open, waste collection services may not be operating.
Some sites have been swamped” by litter and even human waste since lockdown began to ease.
The appeal is backed by Zero Waste Scotland, Keep Scotland Beautiful, Scottish Water, Scottish Natural Heritage and the national park authorities in the Cairngorms and Loch Lomond and the Trossachs.
FLS chief executive Simon Hodgson said the groups want to avoid the “selfish, irresponsible behaviour” that has blighted many sites
He said it risks creates a significant health hazard and affects limited resources.
“The sad thing is, many of the people responsible for the littering would say they were proud to live in Scotland, and yet as we have seen over the past few weeks, they treat our beautiful countryside in this contemptible manner,” he said.
“It’s not acceptable.”
Grant Moir, chief executive officer of Cairngorms National Park Authority, added: “We ask that people are considerate towards each other, to nature and our local communities. In particular, please take your litter home.”