That is something I've noticed as I try to look into state and local elections.
The Green Party seems to naturally want the President to solve everything on their own. But it's funny that the Constitution Party is the one that most preaches the value of states rights, based on their Paleo-Conservative interpretation of the 10th Amendment, but they are making no no effort to win State elections.
I happen to live in Paul Ryan's congressional district, So this November I'll have the opportunity to vote for Jason Lebeck for Ryan's Congressional seat, and Phil Anderson for Senate.
August 9th (this Tuesday) will be the Primary for those elections. And I'm considering voting for Paul Nehlen just to further stick it to Ryan. If by some chance Ryan lost the primary, the chaos that would create would further open the door for Lebeck. Wisconsin is an open Primary, so if you're going to vote for a not Republican no mater what, take the opportunity to stick it to Ryan.
For the Senate primary however, Ron Johnson has no Republican opposition, and the not establishment pick Democrat is Scott Harbach, who is frankly what I call a Trump Democrat. So don't vote for him, make your Protest vote a write in, Incitatus always works for Senate.
Returning to Third Parties. When Third Parties became major parties in the 1800s, it was from gaining ground up success and support in Congress first. The desire to put all efforts into just the Presidency is part of what current ones are doing wrong. Even the Libertarian Party to an extent.
Vote Third Party for President, but support any Third Party running locally too. We need to break this system.
In places where the Libertarians are the only Third Option. I know my Liberal friends despise the Economic and Gun policy of Libertarians, but they are the true Pacifists on Foreign Policy, and do not compromise on individual Liberty, things like LGBT rights and ending the Drug War, and they can be trusted more on those issues then Democrats. So yes vote Green Party if you're a progressive and it's an option, but if not vote Libertarian, you have much to gain and nothing to lose.
Immigration and Abortion are the two most notable issues Libertarians are divided on. And sadly it seems the above mentioned Wisconsin candidates seem to lean to the right on those (while Gary Johnson and Weld themselves are Liberals on those issues). But they will still be much more reasonable on those issues then a Republican party lead by Trump.