Horizon Credit Union - Mullan Branch Horizon Credit Union - Mullan Branch Search | Advanced Search | New Members | Coupons and Discounts | All Categories Finance & Insurance >> Financial Services >> Credit Unions Horizon Credit Union - Mullan Branch 201 North Mullan RdSpokane Valley, WA 99206 | View on Google Maps (509) 928-6180 Member Since: 2017 Send a message to: Horizon Credit Union - Mullan Branch Your Name: Your Email: Subject: Message: (Date: 4/26/2024)