141 miles taking this route:

1. Take I-76 WEST from Sterling to E-470 (tollway) NORTH to FT. COLLINS via SABLE BLVD, which is off EXIT 16 off I-76. Follow signs off the exit ramp to E-470 (tollway) and follow signs to E-470 (tollway) NORTH.
2. E-470 (tollway) becomes NORTHWEST PARKWAY (tollway) after I-25. Continue on NORTHWEST PARKWAY (tollway) to U.S. 36. Turn right onto U.S. 36 NORTH towards BOULDER.
3. Take U.S. 36 to Boulder.

45 miles taking this route:

1. Take IL-47 NORTH from Yorkville to I-88 (Ronald Reagan Mem.) TOLLWAY - EAST to CHICAGO.
2. Take I-88 (Ronald Reagan Mem.) TOLLWAY - EAST to I-355 (Veterans Mem.) TOLLWAY - NORTH to NORTHWEST SUBURBS. EXIT.
3. Take I-355 (Veterans Mem.) TOLLWAY - NORTH to Addison.

184 miles taking this route:

1. Take I-55 NORTH from Springfield to I-355 NORTH TOLLWAY to the NORTHWEST SUBURBS off EXIT 269; follow signs to I-355 NORTH TOLLWAY.
2. Take I-355 NORTH TOLLWAY to LOMBARD.

19 miles taking this route:

1. Go to SR-52, and turn right onto SR-52 WEST; then take SR-52 WEST across to I-25 SOUTH to DENVER.
2. Take I-25 SOUTH to NORTHWEST PARKWAY (tollway) - WEST to BROOMFIELD off EXIT 228.
3. Take NORTHWEST PARKWAY (tollway) - WEST to Broomfield (via U.S. 287 SOUTH [EXIT 52 off Northwest Parkway]).