Benji Praedes wins the queenstage and the gc of the Tour de Banyuwangi Ijen in Indonesia, he won the MTF 2sec ahead of Van Engelen.
The stage results
Patluding Ijen might be the hardest obscure MTF in a small fry race that you have never heared of before:
This race had a brief run as a heavy meme potential event while the Tabriz Petrochemical superteam were around, in fairness.
As for the most brutal climbs in the small, far-flung races (with UCI categorisation) we also have La Georgina / Cerro de la Muerte in the Vuelta a Costa Rica (over 45km at 6,1% to the true summit, 39km at 6% dead on to La Georgina), Aynaloo which has been climbed once by the Tour of Iran-Azerbaijan (24,3km @ 7,6%), Bukit Larut aka Maxwell Hill (used in the 2010 Jelajah Malaysia)(8,4km @ 11,5%), Gunung Jerai (also used in the Jelajah Malaysia)(full climb is 11,6km @ 10,2% but they only went up the first 8,5km or so in the races), Pusuk Sembalun (15km @ 8,1%) that has appeared in the Tour de Lombok, and the west face of Esquipulas Palo Gordo (25,3km @ 7,5%) which has appeared in a couple of Vuelta a Guatemala editions, but not for a couple of decades now.
Slightly better known, there's Filo de Merlo (16km @ 7,8%) in the Tour de San Luís, Mount Fuji in the Tour of Japan (11,6km @ 10%) and Genting Highlands in the Tour de Langkawi (22,3km @ 7,3%).