Conversation so far:
are there trail rides at the houston livestock show and rodeo?
Since 1952, traditional trail rides have been a part of the Houston Livestock Show and Rodeo.
are the trail rides open to the public at the Houston Livestock Show and Rodeo?
Are the trail rides competitive or for leisure at the Houston Livestock Show and Rodeo?
Is the trail ride part of a parade at the Houston Livestock Show and Rodeo?
The city of Houston closes some roads downtown to allow the riders to reach their destination safely. The following day, all of the trail riders participate in the parade.

Question: How far is the longest trail ride?
Self-contained rewrite: How far is the longest trail ride at the Houston Livestock Show and Rodeo?