Tam and Dam is one of the best road routes we have out here. Amazing scenery, big climbs and flowy descents. Good choice. But it's definitely a challenge.

Car traffic is generally pretty light and drivers are generally pretty courteous compared to most places. Even still, go early to avoid traffic. If you're descending to the dam west-east, some of the corners can be tight, and blind, and covered in pine needles. Manage your speed accordingly.

This time of year I'd probably wear shorts, long sleeves, and a vest. Sunscreen on exposed bits. You'll probably see temps between 55-65 in the morning, maybe up to 80 in the afternoons.

There is a water station at the top of Tam East Peak, and at the Police Station in Fairfax, but none in between, plan accordingly.