We recommend flying to Trondheim airport (TRD) and traveling to Røros from there. There are good connections to large European cities, and there will be the option to book a spot on the "PKC-bus" to the venue directly from the airport (< 3 hours drive, ~50 seats, first-come-first-serve) as a part of conference registration, depending on your time of travel. The "PKC-bus" will leave from TRD on Sunday, May 11, at 17:30. You can also follow the bus back to TRD on Thursday, May 15, at 12:45.
Alternative options by plane are flying to Oslo airport (OSL) and taking a train or bus from there, or flying to Røros' own airport (RRS) which has limited domestic connections. If you are attending Eurocrypt in Madrid the week before PKC, your best options are to fly to Trondheim via Amsterdam or directly to Oslo.
Train or bus travel from Trondheim (< 3 hours) or Oslo (< 5 hours) is possible several times a day. Coming by train from other parts of Europe is also an option and we encourage greener travel, but given how far north the town is this quickly becomes a trip of multiple days. Use Entur.no for train and bus options within Norway, and (e.g.) Deutsche Bahn's international planner for booking trains in the rest of Europe.
Røros is a historic mining town located in Trøndelag county, since 1980 it has been registered as a UNESCO World Heritage site. We highly recommend that you explore what Røros and the surrounding Østerdalen has to offer in terms of culture, nature and not in the least locally produced food.
May-temperatures in Røros might be colder than you may expect, averaging around 10 degrees celsius, so please pack clothes accordingly. We recommend to check YR.no for the most up-to-date weather forecast. Røros is a small town and you can reach the beautiful city center in 10-15 minutes on foot from the conference venue.
May 17 is the Norwegian constitution day, and is celebrated all over Norway. We recommend everyone, if available, to go to Trondheim or another larger city in Norway after the conference and stay there for a few extra days to participate in the celebration. There will be a parade, music, and other entertainment, and many Norwegians will be dressed in traditional outfits called "bunad".