To find the total distance from the start of the trail to the lake, you simply need to add the length of the trail to the distance from the end of the trail to the lake.
The length of the trail is 1,580.76 feet and the distance from the end of the trail to the lake is 70.62 feet.
So, the total distance is:
\[ 1,580.76 \text{ feet} + 70.62 \text{ feet} = 1,651.38 \text{ feet} \]
Therefore, the total distance from the start of the trail to the lake is 1,651.38 feet.