Every named stream in the Adirondack Park — the feeder waters that line the High Peaks valleys and fill the ponds.
Guideboard Brook drains into the Paradox Lake basin — a named tributary in the network of streams feeding the lake from the west. No fish species data on record, and no designated access points or trail intersections documented in the DEC system, which likely means it's either intermittent, forested-over, or runs through private land before reaching the lake. The name suggests old Adirondack trail infrastructure — guideboards marked junctions and carry routes in the 19th century, so this was probably a reference point for hunters or loggers working the drainage. If you're tracing it from a map, confirm property boundaries before bushwhacking.