Blue Pots is just slightly more technical than the Guardrail (outer) Loop. It's narrow and twisty, requiring some control at low-speeds. This trail is rooty, rocky, tight, and generally 'raw'. It's a great trail to ride to keep your real bike handling skills up-to-snuff, and it serves as a nice contrast to the newer-school machine-built flow trails.
The trail is apparently named for the rusty old blue enamel cooking pots found during trail work.