Idaho Botanical Garden and the Old Penitentiary Grounds

The Boise skyline at night

The Idaho Botanical Garden is a 15-acre collection of themed gardens on Old Penitentiary Road, east of downtown Boise, built on land that once belonged to the Idaho State Penitentiary. The wider “old prison grounds” now hold three distinct public sites side by side: the botanical garden, the Old Idaho Penitentiary museum, and open foothills … Read more

About what you read here. Everything on Access Boise is general information and our own editorial opinion. We research carefully and we say when the evidence is unclear, but we can be wrong, things change, and no article can know your particular situation. Please do your own research and make your own judgement rather than treating anything here as the final word. Prices, products and specifications around the topics we cover change constantly, and what suits one person will not suit another. Check current details yourself, and where a decision involves real money, safety or something you cannot undo, it is worth confirming with a qualified professional before you act.

We do not book anything. Access Boise is a guide. It sells nothing, takes no bookings or reservations, handles no payments, and holds no tickets, rooms or seats. Some links here lead to travel companies, and some of those are affiliate links that may earn this site a commission at no extra cost to you. Any booking you make is a contract between you and that company, under its own terms, prices and cancellation rules. We are not a party to it and have no responsibility for it — including availability, prices, changes, cancellations, refunds or anything that goes wrong on the trip. Check the details with the company before you pay.