Go ask the question in the 1PG as mentioned above
I own Lewis and Clark and enjoy it quite a lot solo.
I've heard different opinions on this because it works with an automated opponent which you just move one step after every turn you take so it's actually a game where you have to beat the game in x turns (depending on the difficulty you're setting). I don't mind this at all but I understand why some people may think it's lame.
Now about what there is to like:
-different cards in every game, making it REALLY replayable
-easy setup, short gametime (30-45 mins)
-it's a racing game (yay !)
-can be played competitive (for me this is a plus, if I play a co-op like K2 solo I enjoy it, if I play it with more people I sometimes wish I were playing solo because I would've handeled situations differently. As for L&C wether you play solo or not, it's your game)
That's my opinion I guess ^^