Find marked OSM hiking routes in a bounding box, filtered by real computed elevation gain and distance, plus shape and access. Data is OpenStreetMap route relations (same source family as mapy.cz); gain/distance are computed locally, not scraped.

Filters (all optional): elevation gain (m), distance (km), circular (loop vs point-to-point), car_access (parking mapped near a trail end), chairlift_access (a ride-up aerialway — chairlift/gondola/cable car — mapped near a trail end). Boolean filters are tri-state: omit = don't care, true = require, false = exclude.

Confidence: shape (circular) is reliable. car_access/chairlift_access are best-effort from OSM completeness — a false means nothing of that kind is MAPPED near the route's ends, not that it is impossible to get there.