Thimbleberry FAQ

What is a thimbleberry?

The thimbleberry (Rubus parviflorus) is a soft, bright-red wild berry in the rose family (Rosaceae). Unlike many other members of the genus Rubus (like raspberries and blackberries), thimbleberries have no prickles on their canes, making them pleasant to pick. The berries are larger and flatter than raspberries, with a delicate, velvety texture and a tangy-sweet flavor.

Where do they grow?

Thimbleberries are native to two main regions:

• The Keweenaw Peninsula and parts of the western Great Lakes — one of the few eastern North American places where they thrive.
• The western United States and Canada, particularly along the Pacific coast, the Rocky Mountains, and into Alaska.

They prefer cool climates and well-drained, nutrient-rich soils. In the Keweenaw, they’re often found along sunny forest edges, roadsides, and old homestead clearings.

When are they in season?

In the Keweenaw, thimbleberries ripen from late July through early September, with peak season in early August. Because they’re so delicate, they don’t store or transport well — which is why you rarely see them in grocery stores.

Why are thimbleberries special to the Keweenaw?

Our unique climate, shaped by Lake Superior, creates ideal growing conditions for thimbleberries. They’ve been part of local food traditions for generations — most famously in jam, but also in pies, sauces, baked goods, and even drinks. For many locals and visitors, thimbleberries are the taste of summer in the Keweenaw.

Can I pick my own?

Yes! Many locals and visitors forage for thimbleberries, but always respect private property, avoid overharvesting, and be mindful of local ecosystems. Wear sturdy shoes, and bring a shallow container to keep the berries from squishing.

How do I use them?

Because of their delicate texture, thimbleberries are rarely eaten fresh in large quantities. They shine in:

• Jam (their most famous use)
• Vinaigrettes and sauces
• Pies, muffins, and quick breads
• Swirled into yogurt or ice cream

Are they like raspberries?

They’re related but distinct. Thimbleberries have:

• Larger, flatter drupelets (the tiny “bubbles” that make up the berry)
• A more tart and aromatic flavor
• A fragile, melt-in-your-mouth texture that makes them highly prized but hard to ship