Where to Find and Catch Solrock
From Pokemon Go Wiki
Solrock are found and captured in Nest and Habitat locations.
Nests
Solrock Nests are locations that consistently spawn Solrock.
Habitats
Solrock Habitats are spawn locations where Solrock 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: