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I've just recently learned that you can still trigger EX raids by doing (preferrably Lvl 5) raids on some gyms.

As far as i know only specific gyms are suitable for triggering EX raids.


I have 2 questions regarding those gyms:

  • Is there some sort of list where I can see which gyms in my area are possible EX raid gyms?
  • If not, how do I identify which gym is an EX raid gym?
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You can calculate the eligible gyms for ex-raid in an specific area. Let's review what we know about the ex-raids:

  • EX Raids are created based on Level 12 S2 cells. Each cell can only host one EX raid per “invitation cycle”
  • EX Raids can only happen at gyms that are either sponsored or placed in a park related OpenStreetMap tag
  • Gyms that hosted a raid before can and will host an EX Raid again, there is no diminishing returns
  • Ex Raids can be triggered and there could be some randomness to it
  • An EX Raid is triggered only if the gym reaches a minimum amount of raid activity since the last invitation cycle

EX Raids can only occur once inside each S2 cell that passes over your local area. S2 cells are a simple mathematical way to describe a sphere’s geometry. S2 cells come in different sizes, often denoted as levels, and they are often used by developers to create zones on spherical objects, like the planet Earth.

Niantic uses them to control weather, create gyms, define Pokémon catch / hatch locations, etc… For this step we’ll be using the Level 12 S2 cell geometry.

A company named Sidewalk Labs created an incredible tool that draws Level 12 cells over a Google Map. Head over to their Region Converter and do the following:

  • Navigate the map to your local area (our example, Split) Set the parameters in the top left box to: min level 12, max level 12, max cells 10
  • Use one of the drawing tools (square, circle, pin) to select a map area where you want to visualize Level 12 S2 cells

Now that you can see your local S2 cells, remember that an EX Raid can only occur once per cell per cycle. Raiding 100 gyms inside one cell doesn’t benefit you as much as raiding a dozen of eligible gyms in a higher number of cells.

You can see more information in this amazing guide: https://pokemongohub.net/gym-raid-update/comprehensive-guide-trigger-ex-raids/


TL; DR: In order for a gym to be eligible for a EX-Raid:

  • It must be in a park (or a featured gym)
  • It should reach a minimum raid activity
  • Only one gym will be eligible in each area
  • The players will be randomly selected to participate between the ones that did at least one raid in that gym
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    I think your second bullet point is what OP is after (that the gym must be in a park or be sponsored). The rest is interesting but not as relevant. Maybe emphasize that part of your answer? – Kat Jul 30 '18 at 17:15
  • I've added the TLDR section to answer in a more direct way – SysDragon Aug 1 '18 at 11:54
  • So for the first ex-raid to trigger and convert a gym does it need increased activity, or will it show as exraid but not invite anyone? – Pureferret Aug 30 '19 at 18:08
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As of the recent Deoxys announcement, informing us of the EX-Raid boss rotation, you can now see which gyms are eligible for EX-Raids.

And from now on, you’ll be able to see which Gyms can host an EX Raid through a handy tag when you look at the Gym details

To see this information, all you need to do is select the gym. After the gym has loaded, there will be an icon on the top-right that will indicate it will be eligible for EX-Raids.

Gym with Ex-Raid icon
Screen shot borrowed from a local Pokémon Go group I am a part of

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  • This is good info but in practice doesn't help that much -- if one wants to increase their chances of getting an EX invite they have to wander around to all the sponsored and park-related gyms anywhere near them to see if they're EX eligible. That's a lot of work. (But better than nothing!) – SkippyFlipjack Sep 24 '18 at 21:07

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