Subject: Let's Go on a Hiking Adventure!

Hey Lucy,

I hope you're doing well! I've been itching to go on a hiking adventure and I couldn't think of anyone better to join me than you. The benefits of hiking are endless - from the physical exercise to the mental clarity it brings, not to mention the stunning views and fresh air.

I was thinking we could plan a weekend trip to a nearby trail. We can pack some snacks, enjoy the great outdoors, and catch up on life. What do you think? Let's plan this adventure together!

Can't wait to hear your thoughts.

Best,
[Your Name]