With 800+ FMs in the logbook, I guess I can divide it up into sections. Low-power, furthest distance, and shortest distance E-skip.
LOW POWER
KRAZ-105.9 Santa Ynez CA, branded as Krazy Country. Heard 6/16/21 from Ellensburg WA during major e-skip to California/Nevada. This station only runs 65 watts of power, at 863 miles. Easily heard the ID. At the same time I heard the 93.7 'Alt 100.9' translator from San Luis Obispo (99 watts) and the KJOP-1240 translator on 94.1 from Lemoore CA (110 watts). I love strong e-skip openings.
KWMV-LP 95.9 Westcliffe CO comes close. 94 watts, heard 7/5/15. They converted to a 6KW signal on 91.7 and canceled the 95.9 license.
FURTHEST DISTANCE
I've only heard 2Es (double-hop) twice. Once in 2017 and once last year. The latter event shattered the record. 7/20/23, driving mobile with the Hyundai Santa Fe and the Pioneer Supertuner III. Nice opening to 108 MHz to Amarillo, parts of New Mexico, western KS, western OK region. At a 'honey hole' spot in the Wenas Valley, northwest of Selah, where many locals fade to nothing, I had a 94.1 IDing as "Q94", and later went to commercials with a Market Basket commercial. I confirmed it as KQXY Beaumont TX, based on the fact that while Market Basket was in TX, there's NO locations outside of SE TX...so it couldn't be Amarillo. And the ID Q94 was right on course. 1,826 miles.
Tuned over to 95.1 and heard the ID "Kicker 95.1" = it was KYKR Beaumont at 1,830 miles! The signal was amazingly strong for being 2Es. A great memory on a hot summer morning. There were ripe E-skip clouds over multiple locations and everything aligned well.
(No sign of Houston at all. I thought I had KSBJ-89.3 but the Jeremy Camp song wasn't playing at the time. It was probably Altus OK, The House FM. No sign of Louisiana either. Tried 92.1 but couldn't pick up the Lake Charles station. Next time?)
The previous record was from 2017, KWTX-97.5 Waco at 1623 miles. Also 2Es.
SHORTEST DISTANCE
From the monster E-skip opening of 7/14/21, also to California. I had San Francisco up to 103.7, Sacramento to 105.5, and down at 89.3, it was Relevant Radio, which turned out to be KPJP Greenville CA - only 468 miles from Ellensburg!!
However, I had a tentative shorter distance on 89.7, an UNID with the World Cafe, which had it IDed or cued RDS, could have been KNCA Burney CA at only 426 miles. I missed TOH by about a minute.