New Castle boat ramp offers a well-developed access point to the Colorado River with a cement boat ramp, parking area, picnic facilities, and restrooms. Located just 0.

5 miles west of I-70 exit 105, it serves as a convenient put-in for paddlers heading downstream toward Silt (7. 1 miles) on Class I/II waters.

The downstream location is preferable to the upstream put-in as it includes better amenities, though paddlers should be aware of Janice's Rapid approximately 2. 4 miles below this ramp.