Create a bug and then simply take a photo of them and then release them out.
Hopefully your bug will get picked up by either a friend on NEAR or a gamer thats playing the game on NEAR and then when you get your bug back if he has traveled further than 26 miles you will get the trophy pop,
If not then just take another photo of him and release him back out again as the 26 miles doesn't have to be in one go, once he has collectively traveled further than 26 miles you will get the pop then.