Model

Trail Network Representation

Network Waypoints[] + AccessPoint (is this a place rides typically start) TrailSegments + StartWaypoint + EndWaypoint + Trackpoints[] (minus time component?) + Trail (think tagging so consumers can name trails, note difficult sections, etc...)

Simplified for prototyping:

Network TrailSegments : Tracks (minus time component of trackpoints?) + StartWaypoint + EndWaypoint + Trackpoints[]

Input: Track[] (basically a collection of individual rides, analogous to GPX track concept)