Some good, if not a bit
loud, posts here
I used to build many trails and jump lines bitd and still helped out at a few spots until a few years back. There has always been the issue of building on privately owned land, land owners have for a long time flattened trails, they are responsible for them if they are on their land. Now obviously the common sense factor should come into it but accidents happen, and unfortunately it is all to easy to claim these days for damages. One big point to note about building trails or jumps, if anyone does or knows of any, is they can not be classed as constructions, meaning if you use logs say, to pile up as a base for a jump, then put the soil on top to save moving that much soil, or build the base of a berm, then that is classed as construction and they will be knocked down if found. If you make them a feature of the earth, just pile soil up, or even better for jumps, dig a hole and the soil out of it put at the lip of the hole to form a take off, then dig another hole as a landing and continue, that becomes a feature of the terrain and not classed as a man made construction so are not usually destroyed.
The video above is aimed at trail centres more really and builders that have permission to build on the land. Some trails are hard packed to allow drainage and all weather use, the ones that are not get destroyed if ridden in the wet. Which is the main point of the video i feel, the builders spend a hell of a lot of time and effort to create and maintain a trail for others to enjoy, for someone to then go along and use that particular trail and destroy it so others dont get the enjoyment, and the builders have to spend even more time to restore it is a bit selfish and disrespectful. Most of these people will not even offer to help repair or maintain the trails they ride/destroy. Plenty of other places to ride, or even build your own, im sure you would be pissed though if someone came just after you had finished and ripped it all up by riding it in the wet, skidding and doing as they pleased.
A lot of the trails i know survive because they are kept secret, and anyone wanting to ride them has to contribute to their upkeep or development, you learn to respect it more then.