Hello Karen065
The maps in the "wii-fit-plus-island-map-with-cycling-trails" topic may help you.
http://www.wiifitforum.org/spoiler-alert-wii-fit-plus-island-map-with-cycling-trails-t612.html#p1688

Oh boy, "thins" are slow here. Nobody has replied to Karen since Wednesday. I don't have an answer on the flag, but I do guess you know to check the little map in the lower right hand corner?

And my return message from 24 Jun 2010, 20:00 is invisible for other people?

Well you went and put it at the top of the next page! How was I to know?

SPOILER ALERT!

After getting stranded on the EXPERT course quite a few times and unable to find any helpful suggestions online, my girlfriend & I decided to produce our first walkthrough. Hope everyone can follow it.
The Cycling FREE course can be unlocked without fully completing the Expert one, but it will probably annoy the hell out of you until you find all thae blooming flags!
Enjoy!

Wii FIT WALKTHROUGH
Cycling – Expert Level

1. From position at start, pedal forward to follow the LEFT path for FLAG 1 which is visible ahead.

2. At crossroads, take LEFT fork in front of blue ramp. At T-junction with brick bridge on the right, the next flag is visible under the waterfall. Continue onto the grass, bearing slightly left, carefully cycling between the large rock structure and the edge of the river for FLAG 2.

3. Continue forward into the cave under the waterfall. Go over the narrow bridge, then up towards the junction. FLAG 3 is visible ahead.

4. Continue forward uphill to the exit of the cave. Follow narrow, sandy path around the mountain face. Lighthouse and windmills are below on your right. As the castle comes into view, so does FLAG 4 ahead.

5. Cycle forward on the path and over the bridge where you will probably meet a wee four-legged friend! At the T-junction turn LEFT. This path goes uphill through an archway, eventually leading back to the castle. FLAG 5 is collected on grass area on the summit.

6. Continue forward, following the mountain face on your right to another grassy area with a “Stonehenge” structure. Use brakes until you get familiar with the course here. Go over the bridge or through the castle grounds. Follow path on the descent, retracing your earlier climb. Go into cave. Keep to the right to follow the river as before, exiting at the waterfall. As you pass FLAG 2 there is a cave straight ahead with sand in front. Enter this cave and shortly after entering you see FLAG 6.

7. Continue up the metal ramp inside the cave. At the exit of the cave, bear RIGHT onto the grass where FLAG 7 should be visible on the grass, to the left of the three tall stone columns.

8. Continue straight ahead until you see the fence. Go LEFT and downhill across the two rope bridges. Follow the path around to the RIGHT with mountain face on your left. Cut the left corner to go uphill on the grass. This saves distance. FLAG 8 is just ahead on the grass.

9. Immediately take a LEFT towards a ramp and another hidden cave. Continue towards the exit of cave, with FLAG 9 on the white gravel area outside.

10. We’re gonna’ travel far for the next one! Turn around and exit the cave to retrace and join the path ahead beyond the grass, going LEFT and downhill. Cut across to the grass on the RIGHT of the path, following direction of the rope fence. Rejoin the path, bearing RIGHT. At fork bear RIGHT and waterfall should be ahead. At the brick bridge, continue straight on, following the path through the archway. At White House go uphill to the right of the house heading for the Lighthouse. Bear LEFT at Lighthouse and FLAG 10 is behind the building on the grass.

11. Go RIGHT round Lighthouse and downhill towards the windmills. Go over both ramps, through the tarmac road and onto the grass. Bear LEFT and FLAG 11 is just ahead on the path.

12. Cut over the grass to the LEFT to rejoin the tarmac road. You can fall off the wee ledge to get there without injury. Continue downhill towards archway with lighthouse behind you. FLAG 12 is in the arch.

13. Continue on the tarmac road. FLAG 13 is at the bottom of the hill, just after the end of the rope fence on the right.

14. Forward a little. On the next bend cut onto the grass towards a pathway. Follow the path around, with the rope fence on your left. Go up stone ramp to enter the ruins, and to FLAG 14.

15. Retrace your steps out of the ruins, going down the ramp to the left to find the path. Rejoin the tarmac road, heading left. FLAG 15 is just down the road in the “Monaco-style” tunnel.

16. At exit of tunnel, there is a four storey property on your left. Continue down the tarmac road and go onto the grass on your LEFT as you pass the house. Over a slight bump and onto the beach, towards another arch. FLAG 16 is just ahead.

17. Continue forward on the beach, ramps are really crap and just slow you down! Cycle under the arch to find FLAG 17.

18. Continue forward on the beach, bearing RIGHT. With the ocean to your left, FLAG 18 is positioned behind the smaller grass mound ahead of you, slightly to the left.

19. Turn back & retrace your steps on the beach. When you reach the end of the sand, the four-storey property should be on your right. Rejoin the tarmac road, bearing LEFT, towards Red Gate Bridge. Go onto bridge, with FLAG 19 collected as you crest the summit.

20. Continue forward off the bridge, following the tarmac road into town. FLAG 20 is clearly visible ahead.

CAUTION: As you get the FINAL FLAG bear right, cycling between the tree and the fountain. Head towards the stone archway and up the ramp. Ahead and to your left is a BLUE POWER RAMP. Use this to jump to the finish, braking as you land.

This course should gain you THREE STARS and a distance of around 13.5km.

Welcome stevierobson
That's really a great exact description and a good distance.

Look and if you want entry your distance in the high scores table using the link on start screen right near the top (scripting for google.com must be allowed). Some of us use this route: Expert Level route map (jpg)

Great job Stevie and Girlfriend!