How to reply when she says she's into rock climbing

She's telling you she's doing something physically demanding, probably with other people, and she wants to talk about it. The 'recently gotten into' part matters. It means this is still new to her, she's excited about it, and she's still learning. This is not the same as mentioning a hobby she's had for years.

When someone brings up a hobby early on Tinder, they're checking if you're the type of person who listens. People who swipe right on climbers often work out too, are outdoorsy, or at least don't think gym time is weird. She's implicitly asking if that's you.

Your reply needs to do two things. First, acknowledge what she said specifically. Not 'that's cool' but something that proves you read it. Second, ask a question that gives her room to tell you more than she already did. The question should make her want to answer because the answer will either make her look good or let her tell a story.

Ask about something personal, not just a fact. Don't ask 'do you climb outdoors or indoors' when she just said gym. Ask something about the experience or why it grabbed her. What draws her to it. How it fits her week. Whether she's good at it. These are the moves that turn a message into a conversation.

Reply within a few hours of her message, especially if the timestamp shows she sent it during the day. Climbing is the kind of thing people like to talk about if you ask right, so speed matters here. She's already interested enough to bring it up.

After you send your reply, her next message will tell you whether she's still engaged. If she gives you a one-word answer or doesn't ask you anything back, she's losing interest. If she gives you detail and asks you something, keep the back and forth going. Don't let it drop for more than a day. If she goes dark for three days, move on.