Planning to head into Toronto during the G20 Summit for some geocaching? In a word: Don't.
In the best of times, geocachers can appear suspicious by the nature of the game. We use GPS devices to hunt for hidden boxes, that sometimes get mistaken for bombs. That's a bad combination to have outside a meeting of world leaders. If you own a cache near the security zone, you should disable the listing and remove the cache container until the summit concludes. The security people have been asked to remove geocaches by June 18th, so remove it if you want to keep it! This happened with the Vancouver Olympics as well. The other concern with geocaches is the potential for demonstrators to hurl them at Police if things get ugly ... which is why newspaper boxes and mailboxes and such are also being removed.
The Summit is in Toronto June 26-27, but there will be impacts on the community outside those dates especially June 24-28. Bear in mind Huntsville is hosting the G8 Summit June 25-26, and will have similar security impacts on the community/geocaching.
G20 Summit Information
Security Zone Map (PDF)
These are some examples of the caches in or near the security zone:
GCQ60P - I sat today, in the Park
GCR7AX - Great Balls of Fir! (well, sorta)
GC246YR - Jake's Toronto Railfanning Adventure
GC14XNJ - Let’s Go, Blue Jays!
GC1Z12B - CityPlace
GC1QBAJ - Muggle City
GC23BQ5 - Car On A Hill
You will also want to avoid the 401-427-Gardiner combination (PDF) as much as possible from June 24-June 27 as the highways will be closed often enough to create traffic chaos.
While many of the caches are outside the fence, it's not a good idea to go caching near the summit. Do yourself a favour, and choose another part of the GTA to go caching that weekend. Most of the outlying communities - Peel (except near the airport), York, Durham should be fine. This would be a great weekend to explore the Bruce Trail, or the Oak-Ridges Trail.
This topic is being discussed on the Groundspeak Forums as well.