Nichi Aki Senjuro, a prisoner at the El Paso County, Colorado, Detention Center, appeals from the district court's order dismissing his civil rights complaint. Mr. Senjuro sent a letter to the district court indicating his desire to appeal. We treat the letter as the functional equivalent of a notice of appeal. See United States v. Leonard, 937 F.2d 494, 495 (10th Cir.1991). However, the letter was sent outside the maximum thirty-day period from the entry of the order (constituting the judgment) on the court docket. See Fed.R.App.P. 4(a)(1); Herrera v. First N. Sav. & Loan Assn, 805 F.2d 896, 899 (10th Cir.1986). Therefore, Mr. Senjuro's letter noting his appeal was untimely.1 See Houston v. Lack, 487 U.S. 266, 270, 108 S. Ct. 2379, 2382, 101 L. Ed. 2d 245 (1988). In addition, Mr. Senjuro did not move for an extension of the time to appeal within the thirty-day grace period established by Fed.R.App.P. 4(a)(5).2 See Romero v. Peterson, 930 F.2d 1502, 1505 (10th Cir.1991) (discussing excusable neglect standard); Oda v. Transcon Lines Corp., 650 F.2d 231, 232 (10th Cir.1981) (discussing mechanics of Rule 4(a)(5)). Given these facts, we lack jurisdiction to consider his appeal because the time periods established by Fed.R.App.P. 4(a) are " 'mandatory and jurisdictional.' " See Browder v. Department of Corrections, 434 U.S. 257, 264, 98 S. Ct. 556, 561, 54 L. Ed. 2d 521 (1978) (quoting United States v. Robinson, 361 U.S. 220, 229, 80 S. Ct. 282, 288, 4 L. Ed. 2d 259 (1960)).

Mr. Senjuro argues that he did not receive timely notice of the entry of judgment in this case, but this does not obviate the need for a timely notice of appeal or a timely request for an extension. See Fed.R.Civ.P. 77(d) ("Lack of notice of the entry by the clerk does not affect the time to appeal or relieve or authorize the court to relieve a party for failure to appeal within the time allowed, except as permitted in Rule 4(a) of the Federal Rules of Appellate Procedure."). See also Silvia v. Laurie, 594 F.2d 892, 893 (1st Cir.1979) (while failure to receive notice may constitute excusable neglect allowing the district court to extend the time for appeal, a request for extension of time prior to the end of the thirty-day grace period is a prerequisite to relief); Mayfield v. United States Parole Comm'n, 647 F.2d 1053, 1055 (10th Cir.1981) (request for extension of time to file notice of appeal must be made prior to the end of the thirty-day grace period).

In carefully limited circumstances, relief from an untimely notice of appeal may be available. If the district court induced detrimental reliance by an appellant resulting in the filing of an untimely notice of appeal, we may allow the appeal in the "best interests of justice" given such unique circumstances. See Stauber v. Kieser, 810 F.2d 1, 1-2 (10th Cir.1982). See also Pinion v. Dow Chem. U.S.A., 928 F.2d 1522, 1526-35 (11th Cir.1991) (discussing "unique circumstances" doctrine). Here, we have no indication that any statements or actions of the district court resulted in detrimental reliance by Mr. Senjuro. We have also recognized that relief may be available via Fed.R.Civ.P. 60(b). Wallace v. McManus, 776 F.2d 915, 916-17 (10th Cir.1985). A party may seek to set aside the original judgment when notice of its entry was received outside the time in which to file a motion for extension of time under Fed.R.App.P. 4(a)(5). Id. at 917. In this case, however, Mr. Senjuro received notice of entry of judgment prior to the expiration of the thirty-day grace period in which to file for an extension of time to file a notice of appeal. Thus, we must conclude that Mr. Senjuro's failure to note a timely appeal or to obtain an extension deprives this court of jurisdiction to consider his appeal. Accordingly, we GRANT appellee's motion to dismiss, and deny all other pending motions.

APPEAL DISMISSED.