Getting there
The Neuchâtel to La Chaux-de-Fonds line climbs in about thirty minutes and continues to Le Locle and on towards the French border. A second line links La Chaux-de-Fonds to Biel across the Franches-Montagnes, a slow but scenic ride across the plateau. By car you go through the Vue-des-Alpes tunnel, open all year, which avoids the pass on snowy days.
Good to know: both towns sit at a thousand metres. It is regularly five to eight degrees colder than in Neuchâtel, and snow in April is not unusual. Pack one more layer than you would down by the lake, even for an hour outside.