ORDER AND JUDGMENT **

Defendant Appellant Jimmy Leon Fowler appeals following his conviction for possession of a firearm after a former felony conviction in violation of 18 U.S.C. § 922(g)(1). Counsel for Mr. Fowler filed a brief pursuant to Anders v. California, 386 U.S. 738, 87 S.Ct. 1396, 18 L.Ed.2d 493 (1967) and moved for leave to withdraw as counsel. Although Mr. Fowler was afforded 30 days within which to raise any challenges to his conviction or his sentence, he failed to do so within the time period provided. Our jurisdiction arises under 28 U.S.C. § 1291, and we dismiss the appeal and grant counsel’s request to withdraw.

Mr. Fowler was charged with possession of a firearm after a former felony conviction (“Count I”), and possession of ammunition after a former felony conviction (“Count II”). Mr. Fowler thereafter entered an unconditional guilty plea to Count I, and was sentenced to 16 months imprisonment followed by 36 months of supervised release. The district court thereafter dismissed Count II at the government’s request.

In his Anders brief, counsel for Mr. Fowler states that after diligently reviewing the case he was unable to find “any arguable issue that may support an appeal.” Aplt. Br. at 6. In Anders, the Supreme Court held that if appointed counsel “finds his case to be wholly frivolous, after a conscientious examination of it, he should so advise the court and request permission to withdraw.” 386 U.S. at 744. Where counsel has filed an Anders brief, we must *462 conduct a “full examination of all the proceedings” to determine if the appeal is “wholly frivolous.” Id. If we concur in counsel’s evaluation of the case, we may grant the request to withdraw and dismiss the appeal. Id.

After a thorough review of the record we conclude there are no meritorious issues for appeal. As to Mr. Fowler’s conviction, we note at the outset that where a defendant pleads guilty, his “only avenue for challenging his conviction is to claim that he did not voluntarily or intelligently enter his plea.” United States v. Wright, 43 F.3d 491, 494 (10th Cir. 1994) (citing Mabry v. Johnson, 467 U.S. 504, 508-09, 104 S.Ct. 2543, 81 L.Ed.2d 437 (1984)). However, Mr. Fowler has not argued that his plea was involuntary or unknowing, and nothing in the record suggests that it was. As to the validity of his sentence, the record reveals that the sentence imposed was within the applicable guideline range, that the guideline range was correctly determined, 1 and that the district court did not exceed the statutory maximum sentence for the offense of conviction.

Accordingly, we DISMISS the appeal and GRANT counsel’s request to withdraw.