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BOSTON MARATHON 2026

Katherine Nicklebur

TX

Bib: 31921 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Masters (Masters Women)
#0 / 6862
Division (F50-54)
#0 / 1233
Race Day Weather
51°/41°F
overcast clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
9:26/mi
29:18
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
9:17/mi
58:08
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
9:50/mi
1:28:41
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
9:49/mi
1:59:10
↑ 106↓ 860.1%
165 ft elev
HALF· 13.11 mi
9:18/mi
2:05:30
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
10:44/mi
2:31:30
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
11:36/mi
3:07:32
↑ 181↓ 1480.2%
138 ft elev
20M
13:10/mi
3:25:24
↑ 64↓ 500.2%
148 ft elev
21M
12:18/mi
3:37:42
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
10:18/mi
3:45:24
↑ 17↓ 861.7%
156 ft elev
23M
14:01/mi
4:02:56
↑ 23↓ 630.6%
116 ft elev
24M
20:01/mi
4:22:57
↓ 821.3%
34 ft elev
40K· 24.85 mi
17:00/mi
4:37:29
↓ 200.3%
20 ft elev
25.2M
14:16/mi
4:42:24
↑ 13↓ 160.2%
18 ft elev
FINISH· 26.22 mi
10:08/mi
4:52:43
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HALFFaster
Distance13.11 mi
Time2:05:30
Pace9:35 /mi
2nd Half
Distance13.11 mi
Time2:47:13
Pace12:46 /mi
📊Positive Split: 33.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:55:3629:189:2629:18
9:26
-
10K
6.21 mi12:24:2658:089:2228:50
9:17
-0:09
15K
9.32 mi12:54:591:28:419:3130:33
9:50
+0:33
20K
12.43 mi13:25:281:59:109:3630:29
9:49
-0:01
HALF
13.11 mi13:31:482:05:309:356:20
9:18
-0:31
25K
15.53 mi13:57:482:31:309:4626:00
10:44
+1:26
30K
18.64 mi14:33:503:07:3210:0436:02
11:36
+0:52
20M
20.00 mi14:51:423:25:2410:1717:52
13:10
+1:34
21M
21.00 mi15:04:003:37:4210:2312:18
12:18
-0:52
35K
21.75 mi15:11:423:45:2410:227:42
10:18
-2:00
23M
23.00 mi15:29:144:02:5610:3417:32
14:01
+3:43
24M
24.00 mi15:49:154:22:5710:5820:01
20:01
+6:00
40K
24.85 mi16:03:474:37:2911:1014:32
17:00
-3:01
25.2M
25.20 mi16:08:424:42:2411:134:55
14:16
-2:44
FINISH
26.22 mi16:19:014:52:4311:1110:19
10:08
-4:08

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

9:17 /mi

Average Pace

11:10 /mi

Slowest Pace

20:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:25:33

70% of race

Time at Slower Pace

1:27:10

30% of race

Average Pace: 11:10 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:55:3629:189:2629:18
9:26
#24275
10K
6.21 mi12:24:2658:089:2228:50
9:17
#24099
15K
9.32 mi12:54:591:28:419:3130:33
9:50
#24535
20K
12.43 mi13:25:281:59:109:3630:29
9:49
#24572
HALF
13.11 mi13:31:482:05:309:356:20
9:18
#24550
25K
15.53 mi13:57:482:31:309:4626:00
10:44
#24794
30K
18.64 mi14:33:503:07:3210:0436:02
11:36
#25123
20M
20.00 mi14:51:423:25:2410:1717:52
13:10
#25432
21M
21.00 mi15:04:003:37:4210:2312:18
12:18
#25460
35K
21.75 mi15:11:423:45:2410:227:42
10:18
#25405
23M
23.00 mi15:29:144:02:5610:3417:32
14:01
#25708
24M
24.00 mi15:49:154:22:5710:5820:01
20:01
#26408
40K
24.85 mi16:03:474:37:2911:1014:32
17:00
#26690
25.2M
25.20 mi16:08:424:42:2411:134:55
14:16
#26711
FINISH
26.22 mi16:19:014:52:4311:1110:19
10:08
#26645
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi242759811981125312(Top 87%)10340(Top 82%)10340(Top 839%)
10K6.21 mi3.10 mi24099+1769704+1079704+10723911(Top 82%)9618(Top 76%)9618(Top 780%)
15K9.32 mi3.11 mi24535-4369931-2279931-22725312(Top 87%)10340(Top 82%)10340(Top 839%)
20K12.43 mi3.11 mi24572-379953-229953-2224595(Top 85%)9994(Top 79%)9994(Top 811%)
HALF13.11 mi0.68 mi24550+229942+119942+1123820(Top 82%)9597(Top 76%)9597(Top 778%)
25K15.53 mi2.42 mi24794-24410082-14010082-14025899(Top 89%)10732(Top 85%)10732(Top 870%)
30K18.64 mi3.11 mi25123-32910285-20310285-20326257(Top 90%)11037(Top 88%)11037(Top 895%)
20M20.00 mi1.36 mi25432-30910471-18610471-18627537(Top 95%)11782(Top 94%)11782(Top 956%)
21M21.00 mi1.00 mi25460-2810498-2710498-2725511(Top 88%)10781(Top 86%)10781(Top 874%)
35K21.75 mi0.75 mi25405+5510486+1210486+1223894(Top 82%)9940(Top 79%)9940(Top 806%)
23M23.00 mi1.25 mi25708-30310667-18110667-18128150(Top 97%)12167(Top 97%)12167(Top 987%)
24M24.00 mi1.00 mi26408-70011049-38211049-38229009(Top 100%)12573(Top 100%)12573(Top 1020%)
40K24.85 mi0.85 mi26690-28211219-17011219-17028866(Top 99%)12522(Top 100%)12522(Top 1016%)
25.2M25.20 mi0.35 mi26711-2111234-1511234-1527430(Top 95%)11847(Top 94%)11847(Top 961%)
FINISH26.22 mi1.02 mi26645+6611201+3311201+3324189(Top 83%)10221(Top 81%)10221(Top 829%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21story building
+97ft-345ft

Overall

25312

Females

10340

F50-54

10340

5K→10K

3.1 - 6.2 mi

Top 82%
×5story building
+79ft-138ft

Overall

23911

Females

9618

F50-54

9618

10K→15K

6.2 - 9.3 mi

Top 87%
×3story building
+67ft-78ft

Overall

25312

Females

10340

F50-54

10340

15K→20K

9.3 - 12.4 mi

Top 85%
×5story building
+106ft-86ft

Overall

24595

Females

9994

F50-54

9994

20K→HALF

12.4 - 13.1 mi

Top 82%
×2story building
+19ft-37ft

Overall

23820

Females

9597

F50-54

9597

HALF→25K

13.1 - 15.5 mi

Top 89%
×4story building
+66ft-88ft

Overall

25899

Females

10732

F50-54

10732

25K→30K

15.5 - 18.6 mi

Top 90%
×9story building
+181ft-148ft

Overall

26257

Females

11037

F50-54

11037

30K→20M

18.6 - 20.0 mi

Top 95%
×5story building
+64ft-50ft

Overall

27537

Females

11782

F50-54

11782

20M→21M

20.0 - 21.0 mi

Top 88%
×8story building
+106ft-24ft

Overall

25511

Females

10781

F50-54

10781

21M→35K

21.0 - 21.8 mi

Top 82%
×7story building
+17ft-86ft

Overall

23894

Females

9940

F50-54

9940

35K→23M

21.8 - 23.0 mi

Top 97%
×5story building
+23ft-63ft

Overall

28150

Females

12167

F50-54

12167

23M→24M

23.0 - 24.0 mi

Top 100%
×6story building
+12ft-82ft

Overall

29009

Females

12573

F50-54

12573

24M→40K

24.0 - 24.9 mi

Top 99%
×1story
+6ft-20ft

Overall

28866

Females

12522

F50-54

12522

40K→25.2M

24.9 - 25.2 mi

Top 95%
×1story
+13ft-16ft

Overall

27430

Females

11847

F50-54

11847

25.2M→FINISH

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

24189

Females

10221

F50-54

10221

Passing Analysis

Category:
Athletes Passed
801
Passed By
3171
Net Change
-2370
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24275
5K → 10K307131+176#24275#24099
10K → 15K43479-436#24099#24535
15K → 20K115152-37#24535#24572
20K → HALF3412+22#24572#24550
HALF → 25K38282-244#24550#24794
25K → 30K43372-329#24794#25123
30K → 20M20329-309#25123#25432
20M → 21M4573-28#25432#25460
21M → 35K6712+55#25460#25405
35K → 23M6309-303#25405#25708
23M → 24M0700-700#25708#26408
24M → 40K1283-282#26408#26690
40K → 25.2M728-21#26690#26711
25.2M → FINISH759+66#26711#26645
TOTALS8013171-2370
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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OTQ

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing