Hello,Sabrina! I'm Akitaro from Japan.

"to ride a horse" =「馬<font style="background-color: yellow;">に</font>乗ること」(uma ni noru koto)

I hope it will help your under standing.

Have a nice day!

To ride a horse in Japanese will be 「馬に乗る」

you can say 「うまにのります。」

as Bryan said, "Riding a horse" would be more like 「馬に乗ること」is correct.

but we have a word 「乗馬」pronounceation is 「Jyou ba」which stands for 「馬に乗ること」

I can drop the word as a tip for you :)

「馬に乗ります」would translate into "I'm going to ride a horse" or "I ride horses"

"Riding a horse" would be more like 「馬に乗ること」

あきたろさん、どうもありがとう。

Your answer was very helpful!