The fishing season 2018 starts in Andorra on 30th June. Earlier it was planned to start the season on 16th June. However, due to an unprecedented snowy winter and cold spring, the start of the season was postponed.
Last year, the fishing season in Andorra started on 17th June and lasted until 15th October.
Intensive fishing was allowed in accordance with the following schedule:
Lake Engolasters – from 14th March to 19th November
River Ós – from 14th March to 19th November
River Valira del Nord – from 8th April to 15th October
Lake Tristaina – from 15th June to 17 th October
More details find here