just rode the 13 mile red rock scenic loop. entrance fee is
now $5 for bikes. parked about two miles down the way at a largish turnout north of the scenic loop entrance. allowed for a little warmup. wide shoulder on the way there and back but recommend on the early side for less traffic/heat. pavement is fantastic and brand new. nearly all the climbing is in the first six miles.
https://www.strava.com/activities/6068999790