Had a chance to visit a super cool natural spot along the Snake River in Idaho earlier this year, here is the footage. I highly recommend it if anyone is near Boise, it's about an hour south of there.
If you've got balance you should ride your bike on a slackline! ... right? The snow chased us indoors last weekend so we tried the slackline again, but almost twice as long this time at just over 25 feet! it was Way harder! and regular trials stuff too.