Final answer:
The law regarding bicyclists on roadways and trails varies but involves balancing the interests of bikers with those of hikers and horseback riders. Arguments for bicyclist access cite studies showing minimal environmental impact, while opposition focuses on preserving trail tranquility.
Step-by-step explanation:
The discussion about what the law says about bicyclists on roadways and trails involves various perspectives. Some believe that bicyclists should be able to share trails with hikers and horseback riders, arguing that educated mountain biking is respectful of the environment and can coexist with other trail users without causing additional erosion or damage. This view is supported by studies showing that bicycle tires cause no more impact on trails than hikers' boots, and significantly less than horses' hooves. However, there are arguments against allowing bicyclists on certain trails, as some hikers and passive trail users feel that the presence of bicycles disrupts the tranquility of nature experiences, with the potential for conflict between different types of users.