MEMORANDUM **

Patrick Otis Nelson, a California state prisoner, appeals pro se from the district court’s judgment dismissing his 42 U.S.C. § 1983 action for failure to exhaust administrative remedies under the Prison Litigation Reform Act, 42 U.S.C. § 1997e(a). We have jurisdiction under 28 U.S.C. § 1291. We review de novo the district court’s dismissal for failure to exhaust, and for clear error its factual determinations. Wyatt v. Terhune, 315 F.3d 1108, 1117 (9th Cir. 2003). We affirm.

The district court properly dismissed the action without prejudice because Nelson failed to exhaust administrative remedies prior to filing suit. See Woodford v. Ngo, 548 U.S. 81, 93-95, 126 S.Ct. 2378, 165 L.Ed.2d 368 (2006) (holding that “proper exhaustion” is mandatory and requires adherence to administrative procedural rules); Wyatt, 315 F.3d at 1120 (“A prisoner’s concession to nonexhaustion is a valid ground for dismissal.... ”); McKinney v. Carey, 311 F.3d 1198, 1199 (9th Cir. 2002) (per curiam) (requiring exhaustion of administrative remedies prior to filing suit).

We do not consider matters not specifically and distinctly raised and argued in the opening brief, nor arguments and allegations raised for the first time on appeal. *576 See Padgett v. Wright, 587 F.3d 983, 985 n. 2 (9th Cir. 2009) (per curiam).

Appellees’ Request for Judicial Notice filed on March 21, 2011 is denied.

AFFIRMED.