Very Logical Prize Puzzle 302

[grumpy01]

Just some help with this one please. &dn) Perambulate on horseback and show dire difficulty for those ones at Utah National Park (4,3,7) I have ?i?e ?h? m?r?h?s

[fiction-factory]

ride the...

[scorpiojo]

Ride the marshes

[fiction-factory]

marshes

[grumpy01]

Well that's all I could make fit but couldn't find any evidence for it.

[scorpiojo]

Ride them Arches (sorry)

https://www.nps.gov/arch/index.htm

[fiction-factory]

Marches perhaps- ride (dire anag) them arches

[grumpy01]

My son who currently lives in the States said that there were arches in Utah N.P..So I think clue should possibly be 4,4,6

[grumpy01]

Thanks for the answers though both Fiction factory and Scorpiojo.

[scorpiojo]

^ that's how I parsed it (them = those)

http://www.finedictionary.com/Riding%20the%20marches.html

[fiction-factory]

http://www.finedictionary.com/Riding%20the%20marches.html

[hc4361]

It's confusing because there are several national parks in Utah. I think that's a red herring.
Riding the marches is a thing, though.

[fiction-factory]

I'll leave you to it for a bit scorpiojo- looks as if I'm stalking you.