Heritage railway volunteers have "worked tirelessly" to reopen in time for the tourist season after thieves put their trains at risk of derailment. The North Tyneside Steam Railway Association said more than 1,200 fixtures, which safely secure the track, were stolen while the site was closed.
Bosses at the family attraction near North Shields said it could have caused a major accident with "serious consequences".
They said it would still reopen on Sunday after the team worked round the clock to carry out repairs.
Steam-hauled trains are run by volunteers along a two-mile-long (3.2km) railway from Middle Engine Lane to Percy Main for families and enthusiasts.
However, about 800 screws and 400 keys, which fix the track to the sleepers, were found missing covering 75m (246ft) of track in the Percy Main area.
It is estimated to have cost about £2,500 to replace and make the track safe.
