There are a number of Himalayan balsam populations around Inverness. Those located so far are Holm Burn, Mill Burn, Scretan and Cairnlaw Burns (both below Smithton). This is the lower section of the Scretan Burn, showing balsam dominating the banks and floodplain.
If you know of other areas with Himalayan balsam, please let me know by adding a comment below or phoning 01456 486426. Thanks!