I spend a week in March in Ylläs skiing area in Lapland. Seven days in row full of sunshine and perfect cross country skiing weather, the most suitable -4C every day and 80 centimeters of snow. Ski tracks were from 100 metres from the accommodation. You can not wish for more.
With 330 kilometers of skiing routes, some easily accessible, some for long distance skiers, you have plenty to choose from. Some of the tracks enter Pallas-Yllästunturi national park. School holidays had ended just previous week but there were a lot of active skiers around, ski cafes along ski routes were especially crowded at the afternoons.
Some call Ylläs area a mecca for cross country skiers. The maintenance of the routes is closely scrutinised by active skiers who choose their skiing destination in Lapland from many. Visitors can support the maintenance of routes by paying a small voluntary fee for a ski route map (which you need when entering deeper in the Pallas-Yllästunturi national park). There is even a service on the web where can see when the tracks have been last prepared.
Ylläs area has two villages, Äkäslompolo and Ylläsjärvi. Ski tracks connect these two villages, with Yllästunturi fell with downhill slopes between them. If having any wax problems with your skis, you can easily retreat to ski cafes scattered along the ski routes.
There are skiing tracks marked with different colors according to the difficulty level. This track on this video is “blue” meaning easy route, very flat terrain in Ylläsjärvi.