Rode up Railroad Grade with Mark, a little faster than I would have liked. Had bike loaded with same basic gear I'd have on the CT, but still only with 1x10 drivetrain. Made camp at Pantoll via bike-in, walk-in site, then down Coastal, Mark lost his spares bottle, then the town singletrack and steps to Muir Beach, beers at the Pelican, Chris never showed up so at 8:10PM with light fading we left a note and rode back up. Afib hit me hard in the fog and I had to crawl up the hill. Very difficult climb, feeling awful but got back to Pantoll right before Chris arrived. Made dinner and turned in, heart went back to NSR before I fell asleep. Took sleeping pill. Slept OK but neo-air felt a little soft. First night in new Tarptent Moment tent, I like it a lot. Packing practice went OK and bike handled well.