Uhh... it normally takes weeks for a decent taper. How you perform this upcoming race reflects on how you've been training the past 4 weeks [plus your accumulated base]. There's not much more than you can do that will provide significant stimulus while keeping you fresh. At best - you can throw in one or two VO2max sessions.
Stay fresh - do some sharpening skills - sprints, cornering, descending...
Clean your drivetrain now - make sure everything is in tip-top shape now and roll out the bike for a couple rides.
Do your laundry now and get it ready for the stages.
Have fun. Good luck.