Short answer: Worth checking directly before travelling — the site mixes outdoor trails with indoor escape rooms and the mansion, and policies differ between them. The Kensey Valley nearby is a good dog walk either way.
Hidden Valley is a genuinely unusual attraction — puzzle trails through woodland, an escape room, and a mansion full of brain-teasers.
The site splits between outdoor woodland trails and indoor rooms. Attractions structured like this often allow dogs outside but not in the indoor sections, so it's genuinely worth a call ahead rather than assuming either way.
Most people spend far longer here than planned — the puzzle trails alone take a couple of hours if you attempt the harder levels. That's a long time for a dog waiting, which is worth factoring in.
The Kensey Valley path near the steam railway is a flat, pleasant walk a few minutes away — a good option for whoever's minding the dog.
Splitting the group is the practical approach: one does the trails, the other walks the dog and meets at the café afterwards.
Given the site mixes indoor and outdoor sections and policies can differ between them, a phone call before a long drive is genuinely worth the two minutes — particularly if bringing the dog is the deciding factor in whether you go at all.
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