A jam is a gathering or event organised by traceurs or free runners giving them the chance to meet up with each other and train their skills together. Due to the friendly nature of most free running and parkour communities, going to a jam is seen as a good way to meet new people, learn from others and perhaps gain a fresh new approach to their training philosophy.
A jam could consist of anywhere from two people to hundreds. Jams are usually organised by local communities, groups of friends, or larger communities trying to bring people together even from abroad.
 Comparison with other training methods
Going to a jam can be preferable to training by yourself, because with more people there, you could try out new techniques and new routes which you would not have thought of yourself, and gain inspiration and motivation by watching others, as well as learning directly from them.
However, some free runners disagree with large jams as they can create a competitive atmosphere, encouraging participants to try attempt moves which are too high risk, and added pressure of a large amount of people watching could be a distraction.
 Notable organisers
- In the beginning of parkour, David Belle and others from Lisses would host jams, in which attendence would often be in the hundreds
- 3RUN Family Jam is held every year for free runners, traceurs and trickers in London, with attendence reaching the hundreds
- Urban Freeflow hold jams occasionally, usually in London.