Where to Find and Catch Infernape
From Pokemon Go Wiki
Infernape are found and captured in Nest and Habitat locations.
Nests
Infernape Nests are locations that consistently spawn Infernape.
Habitats
Infernape Habitats are spawn locations where Infernape is likely to be encountered, but not guaranteed the way a Nest is.
Additional Tips and Information
Best Nests
If you know a really good nest or any of the nests above is really good, list them here: