Since its inception in 1934 the Mountaincrest Credit Union has been serving its members in the Arlington, Washington area with exceptional financial products. You can find their current interest rates on used car loans, new car loans, 1st mortgage loans and interest rates on both fixed and adjustable mortgages here on these pages. Currently led by Mark Morrison, the Mountaincrest CU has grown its membership to over 10,252 with assets of more than $97,694,386. They have a main office and 2 branch offices.