Judging by the forum posts I'm looking at runners are very serious about this and I don't feel like being subjected to smug ire from classist elitist assholes. The course in question is 95% public sidewalks and I'll be damned if I'm going to pay $75 for a t-shirt, a number, and some snacks (in other words I don't intend to partake in any of them) and I don't even care about placing.
Maybe if I email the organizers and beg they'll give me a fake number so I don't get bullied or something I don't know. Has anyone done this before?
Edit: Thanks everyone you've been very helpful <3 I'm going to email the organizers and try to get a deal and if that doesn't work I'm going to just go for it. Maybe throw in $5 if theres a donation.
No. Running long distances is basically the one thing we evolved to do well besides thinking, your body has an incredible capacity to adapt to longer distances and make them feel normal. Honestly you're way closer than October for a 10k if you're running 4k multiple times a week.
If you only added 10% distance every other week you'd be running 10k by September, but most people don't do their entire race distance when they're training.
To add to this, just make sure to add a long run day once a week before your rest day that's like 70-80% of your target race distance, so 7-8K, and that's basically a standard race training schedule. Work you way up to this distance at first of course so you don't hurt yourself, but you're definitely a lot farther on your training than you think you are.