Making disciples of unreached & unengaged people groups


10/40 is a ministry of Walnut Creek Church with the mission to mobilize, train, send, and support long-term cross cultural workers around the world, while making disciples of unreached peoples in Des Moines. 10/40 is made up of members of Walnut Creek Church who have a desire to be involved in long-term cross-cultural ministry, either in Des Moines or abroad.


10/40 has a Summer Experience and a 9-month 10/40 Group. These programs open up each Summer and Fall. 10/40 also hosts a monthly international prayer meeting one Sunday a month for anyone who would like to pray for the nations and learn more about God’s heart for the world.


Summer Experience groups meet in small teams for 10 weeks each summer, and 10/40 Groups meet weekly in small teams for 9 months starting each September.

Notes From the Field

Read updates from our Goers and learn ways you can pray and support them.

Journey Course

Explore God's heart for the nations in this 6-week class.

10/40 FAQs

What is the 10/40 Summer Experience program?

10/40 Summer Experience is a 10-week program designed to align Christians’ hearts with God’s global passion, help Christians determine their role in the Great Commission and to equip Christians to be more effective long-term disciplemakers. Participants in the Summer Experience will be exposed to cross-cultural ministry in a team based environment and will ultimately decide if long-term cross-cultural ministry is right for them. The Summer Experience program takes place each summer in Des Moines.

What is a 10/40 Group?

10/40 Groups are a 9-month program designed to equip and train Christians for long-term cross-cultural work, both here and abroad. 10/40 Groups are designed to raise up long-term workers that will be sent out by Walnut Creek Church to bless people groups around the world.

Get to know the amazing people who make our ministries happen

From the team:

Greg Altmaier
“10/40 is an opportunity for all of Walnut Creek Church to be involved in the advancement of God’s global gospel around the world today. Whether it is going or sending, praying or giving, we all have a role to play. 10/40 exists to help individuals see what role they play in God’s larger story.”

— Greg Altmaier

10/40 Director

Join a 10/40 Program

If you're interested in learning more about God's heart for the nations, joining a 10/40 Summer Experience group might be a good next step.