Usually, you can prepare for a 5K within 4 weeks as long as you're reasonably fit when you begin training. It's possible to train in as little as 2 weeks if you've been running regularly for a few months. Below are a few sample plans to get you started.Nov 4, 2019
How hard is it to run a 5K without training?
It's possible to run a 5K race without training very much or at all, but it really depends on your current fitness level. Some people are fit enough to easily run a 5K without training, while other people might be really suffering and find it difficult to complete the 3.1-mile distance.