COVID-19 restrictions allowing. The Triumph Owners Motor Cycle Club of Sweden are hosting their annual Britannia Rally in Dalarna for 2021 but there are a few restrictions still due to COVID. No food is being sold on site but they will be selling beer so that's ok. Bands are playing until 9pm on the Friday and Saturday.
For UK members, the current advice (as of 27th June 2021) by the Government is to avoid all but essential travel to Sweden because it is on the Amber list. This means that when you return from Sweden you must self-isolate for 10 days having booked and paid for two PCR tests on day 2 and day 8. Sweden themselves have imposed restrictions on travel from the UK into Sweden and there is currently a temporary ban for anyone travelling from outside the EU/EEA unless you are a Swedish resident (in which case you must have had a negative COVID test).
Of course, this advice can change so you will need to check the requirements nearer to the time if you are intending on going.