The Grizzly, Devon
Numerous races call themselves classics, but this one actually is. It’s so well-liked it has a ballot system for entries.
The Grizzly starts on the seashore at Seaton and leads you across 20-ish muddy, hilly, boggy, beachy miles for one of the multiest-terrain running experiences one can find. It’s also an event with a sense of humor: there are ‘motivational’ messages encouraging your running.
More info axevalleyrunners.org.uk