Trains between Workington and Carlisle are running after repairs to a bridge were completed ahead of schedule.
It was feared that the viaduct over the River Derwent would be shut for six weeks for urgent repairs to be carried out when the issues were discovered on March 1 – meaning train services were cancelled.
Heavy rainfall last month caused damage to the bridge’s pillars.
But services were reinstated this week – with services in operation from Monday.
At the time of the suspension being announced, Phil James, Network Rail’s north-west route director, said problems like this were occurring more frequently because of climate change.
The company said that an unusually wet February resulted in fast flowing water along the River Derwent, which damaged the pillar and riverbed.