Day 4 Spent the whole day driving across Nebraska on I-80. We're in Chappell, NE about 85 miles from Wyoming and 16 miles north of Julesburg, Colorado. Walked around the small town tonight. Altitude is near 3,600. I have a rare headache and dizziness. Remembered that I got deathly ill from altitude in Colorado. I really am a flatlander. Why did I agree to this trip???..........Last night my cousin brought us over a box of fossils. They are soooooo good!! We can bring the rock club up to Omaha, NE area and she'll take us to the creek that she says is loaded with fossils...........Saw a Wal Mart in Lexington, NE that had a HUGE parking lot just for trucks and RVs. It was packed!