Cheers for the pics....made me even more impatient now. Yours looks like a good trip...am sure mine will be too. The tracks through the forest...where exactly? Am looking at Motorway as much as possible on route to Krakow but fancy it a bit more interesting on the way back.
Thanks, Steve.
The first forest tracks are actually very close to the border - after entering Poland in Slubice I followed the E30/A2 for a few miles and then just turned right into the Puszcza Rzepinska (area around Rzepin) to get closer to the river Odra which I followed to Wroclaw.
The muddy and slightly illegal tracks (where I needed some support from the friendly wood workers...

) are located in the Bieszczady Mountains in the most eastern corner of southern Poland (close to the border to Ukraine). We started in Wetlina that day, headed to Tarnica, then north towards the Solina Reservoir. On the way we turned west (sign-posted Zatwarnica) and then north again onto the mentioned cycle track...

which took us to Terka on the 894 eventually.
The other tracks are in the Puszcza Bialowieska (border to Belarus) and in Mazury around Lake Sniardwy - maybe a bit too far off your route? If you are interested I can dig a bit deeper and provide further details.
Basically, wherever you leave the beaten track and the main roads in Poland you will find some off road (i.e. unpaved lanes) fun.
Finally some advice from a local
(courtesy of CosmoSquiq who organised the Poland rally - he is extremely helpful and knowledgeable; so if you are registered on Advrider just drop him a pm (and say hello from me...
)):
Now some info on Polish roads, so that you arrive to Krakow safe:
1. Polish roads suck. First of all they're bumpy. Of course this means poor grip, especially when braking - so make sure you keep your distance from other cars. To make matters worse, the asphalt used here is poor quality - even worse grip, especially when it's wet. I recommend doing some practice in emergency braking once you're here - just to see what this asphalt is about.
2. The white paint used on the roads here is extremely slippery when wet. This type of paint has been forbidden in the EU some time ago, but most of roads here have been built before we joined the EU (some of them were built before we "joined" the Soviet block....). When it's wet - avoid the white paint at all cost. This doesn't apply to some of the roads only, so be careful.
3. Since we don't have many dual-carriage ways, many international roads have only 1 lane in each direction (but they're quite wide). So if you see somobody coming head-on you, just because he's overtaking somebody else, don't panic and go to the right. It's normal here
4. Most roads go through villages. In villages you can meet tractors/cars/dogs entering the road just in front of you, or you can meet hidden policemen with radar. The law says 50km/h in towns, normally you can go up to 69km/h. Anyway, if you see the smurfs (as we call them), slow down to legal speed
Fotoradars take pictures only from the front, so don't mind them.
5. Watch the surface in front of you. Avoid sand, oil, etc etc etc.
6. The road signs are a bit like in Italy
Sometimes a bit unclear 
7. If you see somebody with a broken car, who tries to stop you pretending that he needs help, just keep going. We have the road assistance service quite well developed, and it comes free along with car's insurance. Some of them will try to sell you some stuff (that's they're usual trick), some may want you bike/wallet.
8. If you see somebody behaving strange on the road, presume that he's dead drunk 
Okay okay, it's not that bad. Situations 7 and 8 don't happen often. 6 should be a problem. 1-5 are worth bearing in mind.
But don't let this scare you off - we had loads of fun and even found some incredible smooth roads (EU money well spent...). Just remember that Tourances and mud don't go together well...
Have a safe journey!
