I always found it a struggle to find Big RR maps because people throw Tower Race and other maps together with Big RR so it's hard to split them apart.
Have over 100 actual Big RR maps (with no TTRR parts), and no stupid obstacles or mazes etc.
Those should have a sub-genre different name, I called Big RR with TTRR - "Hybrids", as they combine both, and Big RR with obstacles I simply call obstacle race.
But then again, that involves too much thinking for most people so instead everything gets thrown together and nobody can find the f@#!ing maps they are looking for.