Finder details and explanations to be provided over time.

Clue 1
With a lot of
Joy and Mirth,
Boreas hid his treasure
Somewhere on earth.
"Somewhere on earth" indicates that the treasure is hidden and is on the surface.

Clue 2
By bus, by foot
Or take a car.
Some searcher live near
And some live far.
This indicates that the site is within easy access to all.

Clue 3
Its top is adorned in the summer
And you can often see it there.
But along comes a cold, cold winter
And it's very, very bare.
"It's top is adorned in the summer" is the flagpole which is a major location clue.

Clue 4
A well-known singer
Not quite retired
This single clue
Can leave you inspired.
"A well-known singer not quite retired" refers to Harriet Hilliard Nelson, a top singer from the big band era and later the co-star of the Ozzie and Harriet television show. She was still acting occasionally.

Clue 5
There are places to sit,
And places to rest.
The treasure is waiting
For the one who looks best.
"Places to sit and places to rest" refers to a picnic area. There is a barbeque spot with benches nearby. In addition, there are benches on the river's edge.

Clue 6
Mounds of snow
Will greet your eye
And those who watch
See planes fly by.
"Mounds of snow" made by plows on both sides of the road.

Clue 7
Now you see it,
Now you don't.
Even if you ignore this clue,
Other searchers won't.
"Now you see it, now you don't" refers to the blinking light on the NSP smokestack which is visible from Harriet Island.

Clue 8
A place for a picnic,
Rain or shine.
Find the treasure
And you'll feel just fine!
"A place for a picnic, rain or shine" tells you it's a park with a pavillion that can be used during foul weather.

Clue 9
Stern looks can make you
Feel so sad.
But sometimes they can
Make you glad.
"Stern looks" refers to the sterns, or rears, of many pleasure boats which are stored nearby for the winter.

Clue 10
Here's a clue
That could turn the trick.
Our "well-known singer"
Has a son named Rick.
This helps identify the famous singer, Harriet Hilliard Nelson. Her son Rick, was also a singing star.

Clue 11
Frozen in a icy ball
Is the treasure you seek.
So look for something kinda round,
Near moving water, not a creek.
"Frozen in a icy ball" tells you that the medallion is placed in an ice ball of water and milk mixture. And "moving water, not a creek" clearly indicates the treasure site is on public land along the Mississippi River.

Clue 12
Harriet Island is the place,
But not on a grassy knoll.
The place for you to really look
Is midway between road and flagpole.
The ice ball containing the treasure lies on Harriet Island between the road and the flagpole in front of the pavilion. It is not buried deep but drifted over by recent snow.