Running a 5K? (FILLERRRRRRRRR)?

I'm slowing down. I tell myself it's OK to take 30-35 minutes to run the 5K. Depends what gym I'm in because they have different treadmills & one is located in the foothills which is a higher elevation. (NO I can't run outside it's 105) It gives me stamina, some cardio & health benefits.
Is this OK or am I just fooling myself.

Running a 5K? (FILLERRRRRRRRR)?
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