Teachers would visit Whanganui Intermediate School and Brunswick School, which were both enviroschools, as well as Bushy Park Tarapuruhi.
There were currently 103 enviroschools across the Horizons region, from early childhood education through to primary and secondary sectors.
Williams said there was no right way towards achieving sustainability.
“Each school is on its own path - our team is here to help to smooth that path and make the journey easier.”
Williams said educators at Bushy Park Tarapuruhi offered a range of programmes to connect tamariki to native flora and fauna.
Horizons planned to host more regional days in the future.
“We are hoping to run more hui around the region, including a student-led hui for secondary students later in the year.”
The enviroschools programme aimed to create a generation of young people who would think and act sustainably, Williams said.
“The theme for this road trip is reflection and celebration, which is a huge part of the enviroschools kaupapa – small achievements over time create huge impacts.”
Williams said enviroschools carried out sustainability practices such as waste, biodiversity, transport and social justice.