Bumble bees don’t migrate like birds or stay active like honey bees in a warm hive. Instead, almost the whole colony dies off in late fall, and only the new queens survive winter by hibernating alone underground or in other sheltered spots.

Quick Scoop: Where Do Bumble Bees Go in Winter?

When cold weather hits, here’s what happens to a typical bumble bee colony:

  1. End of the summer colony
    • Workers, males, and the old queen die with the first hard frosts.
 * The colony you saw buzzing all summer does _not_ continue through winter.
  1. New queens are the survivors
    • Late in summer, new queens (called gynes) emerge and mate.
 * These queens stock up on nectar and pollen to build fat reserves before it gets really cold.
  1. Where they actually go
    • Each mated queen leaves the nest and finds her own tiny hideout to hibernate.
 * Typical winter spots include:
   * Small holes in the ground, 5–15 cm below the soil surface.

   * Loose soil banks, leaf litter, and compost or wood piles.

   * Gaps among tree roots or in sheltered crevices.

 * These spots are often on cooler, north-facing slopes so the queen isn’t tricked into waking too early on warm winter days.
  1. How they survive the cold
    • Queens enter a deep hibernation-like state in their little chamber (sometimes called a hibernaculum).
 * They produce special substances like glycerol (a kind of natural antifreeze) that help prevent their bodies from freezing solid.

 * They stay buried and inactive until soil temperatures warm up enough in spring.
  1. What happens when winter ends
    • In early spring, surviving queens crawl out of the ground or leaf litter and start feeding on early flowers to recharge.
 * Then each queen searches for a nesting site—often an old rodent burrow, tussock of grass, or other cozy cavity—to start a brand‑new colony for that year.

Simple Example

If you watched a bumble bee nest under your shed all summer, by winter that nest is empty or dead, and the only survivors are a few mated queens now hidden:

  • One might be in a small hole under nearby shrubs.
  • Another could be tucked into a bank of loose earth beside a path.

Come spring, you might see large, single bumble bees flying low and slowly—that’s usually a queen that has just emerged from her winter hideout and is house‑hunting for a new nest.

How You Can Quietly Help Them

You don’t have to do much to make winter easier for bumble bee queens:

  • Leave some leaf litter and messy corners in your yard over winter so queens can shelter there.
  • Avoid digging or tilling soil deeply in late fall and very early spring, when queens are settling in or just about to emerge.
  • Plant early‑flowering plants (willow, crocus, heather, lungwort, etc.) to feed newly awakened queens in spring.

TL;DR:
Bumble bees don’t keep their nests going all winter. Almost all bees in the colony die after the first hard frosts, and only the newly mated queens survive by hibernating alone in small underground holes, leaf litter, or other sheltered spots until spring.

Information gathered from public forums or data available on the internet and portrayed here.