Conversation so far:
do Houston Livestock Show and Rodeo have 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?
As of 2017, there were 13 official trail rides, totaling over 3,000 riders.
Are the trail rides competitive or for leisure?
The trail rides range in size from a dozen to over one thousand people who ride on horseback or in horse-drawn wagons from various areas of the state to Houston.
Is the trail ride part of a parade?
The trail rides last from a few days to three weeks, depending on the distance they cover.

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?