ALAMOSA — Alamosa County Treasurer Lois Widhalm, reminds Alamosa County residents that full payments for 2017 property taxes are due on April 30.  On-line payments may be made at www.alamosacounty.org/treasurer through April 30.  Mailed payments must be postmarked April 30th. For property owners who pay their taxes in two installments, the second payment deadline is June 15. The treasurer’s office is located at 8999 Independence Way. Office hours are 8 a.m. - 4:30 p.m. M-F. Call 589-3626 with any questions.