Trials riders generally toil for little more than trophies, so Karl Davis Jr. (center) was doubly stoked to win the Inaugural California Trials Invitational, presented by GasGas. Josh Roper (left) was second, three points back, 36-39, while Alex Niederer (right) took third with his 44. (Ironically—and proving there was no favoritism shown—GasGas rider Daniel Blanc-Gonnet was fifth.) (Mark Kariya/)Despite being a spectacular display of rider talent, observed trials has never gained the popularity of motocross, enduros, and other genres of...