Here are some retreat centers in New Jersey, hosted by the Diocese of Trenton:

1. Francis House of Prayer (Allentown, NJ): Offers spiritual retreats and workshops.
2. San Alfonso Retreat House (Long Branch, NJ): A coastal retreat hosted by the Redemptorists.
3. Upper Room Spiritual Center (Neptune, NJ): A center offering retreats and spiritual direction.
4. Morning Star House of Prayer (Trenton, NJ): A retreat house managed by the Religious Teachers Filippini.

For more details, visit the Diocese of Trenton retreat houses page.