Both festivals command a loyal following, and both won big at the Visit Herefordshire Awards 2016 which is where River Carnival organisers Becca Huggett and Jo Henshaw bumped into Rob Nosworthy and hatched a plan to work together.
From what we've heard it's a Herefordshire collaboration worth waiting for - with Nozstock curating the line-up for dedicated music tent on Castle Green.
Also getting involved in the river carnival's live music programme will be county charity Musicpool and resident DJs from Reggae Pie and Wild Hare Club.
As well as working with the Noz festival family, the 2017 River Carnival committee are introducing an after-dark street performance.
Taking place on Friday April 28, the torch-lit show will see mythical beasts, inspired by the creatures crawling on the city’s Mappa Mundi, come to life.
Designed to appeal to the Beefy Boys generation and city Millenials, Mappa Mundi: Out of the Museum and into the Streets is part of a three-year project fronted by the River Carnival to the celebrate the medieval world map that's housed inside Hereford Cathedral.
If you think the 700-year-old map sounds dry and dusty, we're talking about a calf-skin atlas that puts Jerusalem at the centre of a flat world and featues no less than 500 detailed drawings depicting the history of humankind and the marvels in it. A personal fave is the unicorn.
Essentially, it's bonkers, as the Golden Fleece of Greek myth (pictured below) suggests. [explore the Mappa Mundi in detail here.]
An estimated 7,000 people will head to the 2017 Hereford River Carnival on Saturday, April 29.
As always, there'll be a street procession and rafts on the river Wye plus stalls, live entertainment and general pro-Hereford vibes. Keep an eye out for the h.Energy village where you'll get free lessons in how not to destory the planet, and the chance to watch yellow plastic ducks floating down Wye (aka the Hereford Rotary Club duck race).
Confirming the collab with a summer festival loved for its hip-hop and dub step, carnival organiser Becca said it was a "perfect match".
"Nozstock is known for its down to earth, family-focused atmosphere and that is exactly what you get at the River Carnival," she said.