One Challenge building

Contact Us

Mailing Address: One Challenge, PO Box 36900, Colorado Springs, CO 80936

Physical Address: 5801 N Union Blvd, Colorado Springs, CO 80918

Office Hours: Monday-Friday, 8 a.m. to 5 p.m.

Map and Directions

Telephone: 719.592.9292 Toll-free: 800.676.7837 Fax: 719.592.0693

Stay Connected

Would you like to receive OC news or a specific mission worker’s newsletter by email?

Send Us a Comment Here:

  • This field is for validation purposes and should be left unchanged.

Please use the following email addresses for requesting specific information or regarding questions or comments.

General Information:
for general questions and/or comments

Change of Address:
for donors who need to change their mailing or email address with One Challenge… or if you want to change from paper to electronic prayer letters

for questions related to being a mission worker with One Challenge

WorldView Registration:
for registering to attend a WorldView seminar

Short Term:
for questions regarding short-term missions with One Challenge

Creative Access:
for interest in an area that has been traditionally closed to mission workers

Host a Seminar:
for sponsoring a WorldView or PathFinder seminar

Sports Ambassadors:
for sport ministries

Honest Answers:
for questions and/or comments about missions, preparing for the field… Or go to the Honest Answers page.

for questions about your donor account or general finances

OC Alumni:
for questions about or from OC alumni

for comments about the site

Become a Mission Worker

One Challenge’s Mobilization department can be reached at:


Missions Mobilization
One Challenge is an international mission sending agency empowering local church ministry in more than 100 countries around the world. We seek to empower the whole body of Christ to bring a transforming love and hope to all people. When invited by local leaders, OC facilitates local bodies of believers to identify, train, and send global workers toward realizing a “from everywhere to everywhere” vision. For more information, please email OC Mobilization at Or go to our Mobilization blog called “Prepare for Impact” at