How can I ask this guy if he wants to go on a walk?

Lol this sounds so innocent. There’s this guy i used to speak to and we got along well we kinda like dated 2 years ago but not properly at all just texted everyday and stuff. Anyway he goes on nice walks i see that he posted on snapchat and i wanna ask him if he wants to go on one but i don’t want him to think i’m weird? I know he finds me very attractive and used to like me but i just don’t know how to ask lol without sounding odd? Help
How can I ask this guy if he wants to go on a walk?
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