The conditions meant running order was not as crucial although section seven was still incredibly tough once mud had been dragged onto already smooth and slippery rocks. Taking maximum scores from the entire TrialGP field on the opening lap, Jaime Busto - Repsol Honda recorded the only clean here on lap two.
Along with Bou and Raga, Albert Cabestany - Sherco picked up two maximums on section seven, but after slumping to eighth on day one the Spaniard was back in contention and ended the day third, eight marks behind the winner.
Spain's Jeroni Fajardo - Vertigo won a close fight for fourth after recording the lowest second lap total of the Trial for a two-mark advantage over Takahisa Fujinami - Repsol Honda who beat Busto into sixth on a tie-break.
Following his second-placed finish the previous day, Britain's James Dabill - Gas Gas was in contention after lap one, but he slipped to seventh, one mark behind Fujinami although still a comfortable eighteen marks clear of Germany's Franz Kadlec - Gas Gas in eighth.
Last year's FIM Trial2 World Cup winner Jack Price - Gas Gas gave himself a great twentieth birthday present with a fantastic ride for ninth, a career-best finish for the rising British star.
Trial2 saw another incredibly close finish with Spain's Francesc Moret - Honda holding an early advantage before Britain's Iwan Roberts - Beta claimed a one-mark victory with a clean second lap. Marc Riba - TRS from Spain was third.
In a reversal of Saturday's result, Italian Lorenzo Gandola - Scorpa took victory in Trial125 from early leader Billy Green - Beta after the British rider picked up two fives on the final lap including a maximum when he was deemed to have stopped forward motion. Spain's Eric Miquel - TRS matched his day one result with third.
After a hectic start to the new TrialGP era, the series will now enjoy a short break before resuming in the mountains of Andorra in mid June.