Yes it was hi proof ethanol fueled as no gasoline in its time, but plenty of biodegradable producers.
The Pig Trail is Hwy 23 south of Huntsville and follows path hogs made as easiest way through the Mt. Then later farmers used it to herd hogs to market. Its the most famous bike road in Ark. Its not my favorite d/t more traffic and parts of it can scare ya, but can give opportunity to lean to foul something. Its a good ride N too from Eureka Springs to I-40, about 2 hr all told. But dang it, any and every way you take around here gives twisted curvy new vistas every few seconds. Its deadly dangerous, body counts from deer and off bluffs hits news once a week or so, I don't ride to ever get scared - just not crash d/t my fault. Trixie Combat bless her fully fettered factory heart, is a bowl of jello to me compared to Ms Peel. My best out of state BMW biker took me to Hwy 123 and pointed out where his best buddy died over the edge, then couple years later Bob got creamed on Texas hwy.
A mag reviewing, but Hwy 23 goes on wonderful beyond this section.
http://www.motorcycleroads.com/routes/S ... AR_4.shtml