Looking at Terlingua stats, I find non-DST sunrise of 7:22 AM and sunset of 6:51 PM. As such I am planning to have the group breakfast from 7 - 9 AM, with Desert, Adventure, and Dos Y Dos challenges kicking off at 8AM. Last year I made a snafu and had challenges starting at 8 AM, but this was just after the change to DST and so we were heading out before sunrise. Opps, sorry for that guys.
This year lets hope for the best winter weather possible. Highs in Terlingua on Feb 23 can be as high at 90, and lows as low as 15. But most years we fall in that super sweet spot of highs in the mid 70's and lows in the mid 40's, aka perfect riding and camping weather.
A couple of things to note about temps: The farther you head west and north, the colder you should expect to be. Riders on the Adventure challenge need to be aware that Marfa Texas has average highs and lows almost 15 degree cooler than Terlingua. Even just riding up highway 170 to Presidio, expect to see a 10 degree temp drop. Likewise Panther Junction, up in the National Park, at much higher elevation than river road, has averages 10 degrees cooler than Terlingua. And if you continue past Panther Jctn to Rio Grande Village for the Dos y Dos, expect the warmest temps, about 5 degrees above Terlingua. Of course, last year, late March, we saw ice everywhere..from a hail storm, not cold, haha.
Cliff notes: Be ready for hot or cold riding weather. Don't be the guy in an MX jersey 30 miles away from HQ at sunset and 40 degree with wind. Its no fun. Been there, done that. Miserable.
Peter