Bikes yield to everyone
Cyclists slow or stop for hikers and horses.
Hiking / Trail rules
Few of these are 'laws,' but they're what keep trails open, safe, and beautiful - and what makes you a good neighbor on the trail. Here's the short version.
The seven Leave No Trace principles, in plain terms:
"Leave what you find" includes rocks, plants, and artifacts - see the Foraging hub; "respect wildlife" means never feeding it - see the Wildlife hub.
The big one
Cutting switchbacks and going off-trail causes erosion, tramples habitat, and gets people lost. Walk single file through the middle, even when it's muddy.
When trails are shared, the rule is simple:
Cyclists slow or stop for hikers and horses.
They spook easily - talk calmly so the horse hears a human voice.
The person climbing has the right of way. It's a firm rule for bikes and good manners for hikers.
Official sources
The seven principles come from the Leave No Trace Center; the dog, drone, and trail rules from TPWD. Each park can set its own specifics, so the park's page is the final word.
Caution: Most of these are courtesies, not laws - but breaking them gets trails damaged and closed. A park's own rules (dogs, drones, closures) are the final word.