The second line is actually the finish. That was confusing after running a hard race. I sprinted to the end and caught some people, but I wasn't sure if I crossed unhealthy line in the moment.
Make sure shoes are a good fit. I ran in somewhat new shoes and got blisters on my toes because they squished them. Don't wear extra clothing, then you'll have to carry it. You'll be warm enough running.
Give it your all down the steep parts. Let loose and let gravity take you down!