There are multiple songs titled "Somewhere Down the Road" with different lyrics by different artists. Here are the lyrics for two well-known versions: Barry Manilow - "Somewhere Down the Road"
We had the right love at the wrong time
Guess I always knew inside I wouldn't have you for a long time
Those dreams of yours are shining on distant shores
And if they're calling you away, I have no right to make you stay
But somewhere down the road, our roads are gonna cross again
It doesn't really matter when
But somewhere down the road, I know the heart of yours will come to see
That you belong with me
Sometimes goodbyes are not forever
It doesn't matter if you're gone
I still believe in us together
I understand more than you think I can
You have to go out on your own so you can find your way back home
And somewhere down the road, our roads are gonna cross again
It doesn't really matter when
But somewhere down the road, I know the heart of yours will come to see
That you belong with me
Letting go is just another way to say I'll always love you so
We had the right love at the wrong time
Maybe we've only just begun
Maybe the best is yet to come
'Cause somewhere down the road, our roads are gonna cross again
It doesn't really matter when
But somewhere down the road, I know the heart of yours will come to see
That you belong with me

. Amy Grant - "Somewhere Down the Road"
So much pain and no good reason why
You've cried until the tears run dry
And nothing here can make you understand
The one thing that you held so dear
Is slipping from your hands
And you say
Why, why, why does it go this way?
And why, why, why?
And all I can say
Is somewhere down the road
There'll be answers to the questions
Somewhere down the road
Though we cannot see it now
Somewhere down the road
You will find mighty arms reaching for you
And they will hold the answers at the end of the road
Yesterday I thought I'd seen it all
I thought I'd climbed the highest wall
Now I see the learning never ends
And all I know to do is keep on walking
Walking 'round the bend saying
Why, why, why does it go this way?
And why, why, why?
And all I can say
Is somewhere down the road
There'll be answers to the questions
Somewhere down the road
Though we cannot see it now
Somewhere down the road
You will find mighty arms reaching for you
And they will hold the answers at the end of the road
Oh, keep on walking

. These are the two most prominent versions of "Somewhere Down the Road" with their lyrics available online. Let me know if you want lyrics for a specific artist or version.