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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Erika Nakamura Da Costa

Bib: 21177 β€’F β€’Age: N/A

Boston Marathon logo
0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Top 48%
Gender (Female)
#0 / 12578
Top 34%
Masters (Masters Women)
#0 / 6862
Top 18%
Age Group (F45-49)
#0 / 1786
Top 19%
Race Day Weather
51Β°/41Β°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
24:57
3.11 mi
Rank: #17153
Start β†’ 5K
24:57 | 8:02/mi
10K
49:13
6.21 mi
Rank: #16476 (+677)
5K β†’ 10K
24:16 | 7:49/mi
15K
1:13:29
9.32 mi
Rank: #16120 (+356)
10K β†’ 15K
24:16 | 7:49/mi
20K
1:38:31
12.43 mi
Rank: #16237 (-117)
15K β†’ 20K
25:02 | 8:04/mi
HALF
1:43:39
13.11 mi
Rank: #16082 (+155)
20K β†’ HALF
5:08 | 7:32/mi
25K
2:02:27
15.53 mi
Rank: #15623 (+459)
HALF β†’ 25K
18:48 | 7:46/mi
30K
2:27:17
18.64 mi
Rank: #15206 (+417)
25K β†’ 30K
24:50 | 8:00/mi
20M
2:38:02
20.00 mi
Rank: #14951 (+255)
30K β†’ 20M
10:45 | 7:55/mi
21M
2:46:20
21.00 mi
Rank: #14719 (+232)
20M β†’ 21M
8:18 | 8:18/mi
35K
2:52:11
21.75 mi
Rank: #14650 (+69)
21M β†’ 35K
5:51 | 7:50/mi
23M
3:01:54
23.00 mi
Rank: #14373 (+277)
35K β†’ 23M
9:43 | 7:46/mi
24M
3:09:18
24.00 mi
Rank: #14141 (+232)
23M β†’ 24M
7:24 | 7:24/mi
40K
3:15:45
24.85 mi
Rank: #13951 (+190)
24M β†’ 40K
6:27 | 7:33/mi
25.2M
3:18:36
25.20 mi
Rank: #13874 (+77)
40K β†’ 25.2M
2:51 | 8:16/mi
FINISH
3:26:20
26.22 mi
Rank: #13801 (+73)
25.2M β†’ FINISH
7:44 | 7:36/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st Halfβš–οΈ Balanced
via HALF
Distance13.11 mi
Time1:43:39
Pace7:55 /mi
2nd Halfβš–οΈ Balanced
Distance13.11 mi
Time1:42:41
Pace7:50 /mi
πŸ“ŠEven Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:11:2324:578:0224:57
8:02
-
10K
6.21 mi11:35:3949:137:5624:16
7:49
-0:13
15K
9.32 mi11:59:551:13:297:5424:16
7:49
0:00
20K
12.43 mi12:24:571:38:317:5625:02
8:04
+0:15
HALF
13.11 mi12:30:051:43:397:555:08
7:32
-0:32
25K
15.53 mi12:48:532:02:277:5318:48
7:46
+0:14
30K
18.64 mi13:13:432:27:177:5524:50
8:00
+0:14
20M
20.00 mi13:24:282:38:027:5510:45
7:55
-0:05
21M
21.00 mi13:32:462:46:207:568:18
8:18
+0:23
35K
21.75 mi13:38:372:52:117:565:51
7:50
-0:28
23M
23.00 mi13:48:203:01:547:559:43
7:46
-0:04
24M
24.00 mi13:55:443:09:187:547:24
7:24
-0:22
40K
24.85 mi14:02:113:15:457:536:27
7:33
+0:09
25.2M
25.20 mi14:05:023:18:367:532:51
8:16
+0:43
FINISH
26.22 mi14:12:463:26:207:537:44
7:36
-0:40

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

πŸ“ˆPace 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

7:24 /mi

Average Pace

7:53 /mi

Slowest Pace

8:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

πŸ“ŠSegments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

3:15:11

95% of race

Time at Steady Pace

11:09

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:52 /mi

Loading chart...
Faster pace (< avg)
Steady pace (β‰ˆ 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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:11:2324:578:0224:57
8:02
#17153
10K
6.21 mi11:35:3949:137:5624:16
7:49
#16476
15K
9.32 mi11:59:551:13:297:5424:16
7:49
#16120
20K
12.43 mi12:24:571:38:317:5625:02
8:04
#16237
HALF
13.11 mi12:30:051:43:397:555:08
7:32
#16082
25K
15.53 mi12:48:532:02:277:5318:48
7:46
#15623
30K
18.64 mi13:13:432:27:177:5524:50
8:00
#15206
20M
20.00 mi13:24:282:38:027:5510:45
7:55
#14951
21M
21.00 mi13:32:462:46:207:568:18
8:18
#14719
35K
21.75 mi13:38:372:52:117:565:51
7:50
#14650
23M
23.00 mi13:48:203:01:547:559:43
7:46
#14373
24M
24.00 mi13:55:443:09:187:547:24
7:24
#14141
40K
24.85 mi14:02:113:15:457:536:27
7:33
#13951
25.2M
25.20 mi14:05:023:18:367:532:51
8:16
#13874
FINISH
26.22 mi14:12:463:26:207:537:44
7:36
#13801
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi171536005600515429(Top 53%)4997(Top 40%)4997(Top 280%)
10K6.21 mi3.10 mi16476+6775617+3885617+38815742(Top 54%)5159(Top 41%)5159(Top 289%)
15K9.32 mi3.11 mi16120+3565404+2135404+21315429(Top 53%)4997(Top 40%)4997(Top 280%)
20K12.43 mi3.11 mi16237-1175496-925496-9216548(Top 57%)5670(Top 45%)5670(Top 317%)
HALF13.11 mi0.68 mi16082+1555407+895407+8913341(Top 46%)3786(Top 30%)3786(Top 212%)
25K15.53 mi2.42 mi15623+4595139+2685139+26813465(Top 46%)3995(Top 32%)3995(Top 224%)
30K18.64 mi3.11 mi15206+4174925+2144925+21413450(Top 46%)4097(Top 33%)4097(Top 229%)
20M20.00 mi1.36 mi14951+2554797+1284797+12812243(Top 42%)3541(Top 28%)3541(Top 198%)
21M21.00 mi1.00 mi14719+2324683+1144683+11411898(Top 41%)3479(Top 28%)3479(Top 195%)
35K21.75 mi0.75 mi14650+694660+234660+2313250(Top 46%)4221(Top 34%)4221(Top 236%)
23M23.00 mi1.25 mi14373+2774518+1424518+14210815(Top 37%)3026(Top 24%)3026(Top 169%)
24M24.00 mi1.00 mi14141+2324400+1184400+1189413(Top 32%)2386(Top 19%)2386(Top 134%)
40K24.85 mi0.85 mi13951+1904322+784322+789229(Top 32%)2410(Top 19%)2410(Top 135%)
25.2M25.20 mi0.35 mi13874+774287+354287+3510187(Top 35%)2951(Top 23%)2951(Top 165%)
FINISH26.22 mi1.02 mi13801+734267+204267+2012160(Top 42%)3953(Top 31%)3953(Top 221%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
Γ—21
+97ft-345ft

Overall

15429

Females

4997

F45-49

4997

5K→10K

3.1 - 6.2 mi

Top 54%
Γ—5
+79ft-138ft

Overall

15742

Females

5159

F45-49

5159

10K→15K

6.2 - 9.3 mi

Top 53%
Γ—3
+67ft-78ft

Overall

15429

Females

4997

F45-49

4997

15K→20K

9.3 - 12.4 mi

Top 57%
Γ—5
+106ft-86ft

Overall

16548

Females

5670

F45-49

5670

20K→HALF

12.4 - 13.1 mi

Top 46%
Γ—2
+19ft-37ft

Overall

13341

Females

3786

F45-49

3786

HALF→25K

13.1 - 15.5 mi

Top 46%
Γ—4
+66ft-88ft

Overall

13465

Females

3995

F45-49

3995

25K→30K

15.5 - 18.6 mi

Top 46%
Γ—9
+181ft-148ft

Overall

13450

Females

4097

F45-49

4097

30K→20M

18.6 - 20.0 mi

Top 42%
Γ—5
+64ft-50ft

Overall

12243

Females

3541

F45-49

3541

20M→21M

20.0 - 21.0 mi

Top 41%
Γ—8
+106ft-24ft

Overall

11898

Females

3479

F45-49

3479

21M→35K

21.0 - 21.8 mi

Top 46%
Γ—7
+17ft-86ft

Overall

13250

Females

4221

F45-49

4221

35K→23M

21.8 - 23.0 mi

Top 37%
Γ—5
+23ft-63ft

Overall

10815

Females

3026

F45-49

3026

23M→24M

23.0 - 24.0 mi

Top 32%
Γ—6
+12ft-82ft

Overall

9413

Females

2386

F45-49

2386

24M→40K

24.0 - 24.9 mi

Top 32%
Γ—1
+6ft-20ft

Overall

9229

Females

2410

F45-49

2410

40K→25.2M

24.9 - 25.2 mi

Top 35%
Γ—1
+13ft-16ft

Overall

10187

Females

2951

F45-49

2951

25.2M→FINISH

25.2 - 26.2 mi

Top 42%
Γ—2
+22ft-21ft

Overall

12160

Females

3953

F45-49

3953

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
3892*
Passed By
482
Net Change
+3352
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start β†’ 5K----#17153
5K β†’ 10K765*88+677#17153#16476
10K β†’ 15K433*77+356#16476#16120
15K β†’ 20K141200-117#16120#16237
20K β†’ HALF1583+155#16237#16082
HALF β†’ 25K465*6+459#16082#15623
25K β†’ 30K447*30+417#15623#15206
30K β†’ 20M259*4+255#15206#14951
20M β†’ 21M239*7+232#14951#14719
21M β†’ 35K8920+69#14719#14650
35K β†’ 23M282*5+277#14650#14373
23M β†’ 24M236*4+232#14373#14141
24M β†’ 40K1944+190#14141#13951
40K β†’ 25.2M781+77#13951#13874
25.2M β†’ FINISH10633+73#13874#13801
TOTALS3892*482+3352

* Includes athletes who did not complete a segment (DNF/DNQ).

πŸ“Š

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

πŸ“ˆPosition Graph

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🎨Heatmap Timeline

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πŸ”„Passing Circle

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🌊Position Flow

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πŸƒRace Lanes

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