Boston Marathon logo
BOSTON MARATHON 2023

Heather Adams

Bib: 23213•F

NC

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:53
Rank: #18610
Start → 5K
26:53 | 8:39/mi
10K· 6.21 mi
53:35
Rank: #18661 (-51)
5K → 10K
26:42 | 8:36/mi
15K· 9.32 mi
1:20:23
Rank: #18614 (+47)
10K → 15K
26:48 | 8:38/mi
20K· 12.43 mi
1:47:37
Rank: #18577 (+37)
15K → 20K
27:14 | 8:46/mi
Half· 13.11 mi
1:53:39
Rank: #18638 (-61)
20K → Half
6:02 | 8:51/mi
25K· 15.53 mi
2:15:24
Rank: #18673 (-35)
Half → 25K
21:45 | 8:58/mi
30K· 18.64 mi
2:43:39
Rank: #18454 (+219)
25K → 30K
28:15 | 9:06/mi
20M
2:56:11
Rank: #18390 (+64)
30K → 20M
12:32 | 9:13/mi
21M
3:06:04
Rank: #18340 (+50)
20M → 21M
9:53 | 9:53/mi
35K· 21.75 mi
3:12:58
Rank: #18346 (-6)
21M → 35K
6:54 | 9:13/mi
23M
3:25:11
Rank: #18420 (-74)
35K → 23M
12:13 | 9:45/mi
24M
3:34:54
Rank: #18518 (-98)
23M → 24M
9:43 | 9:43/mi
40K· 24.85 mi
3:43:18
Rank: #18572 (-54)
24M → 40K
8:24 | 9:49/mi
25.2M
3:46:58
Rank: #18602 (-30)
40K → 25.2M
3:40 | 10:38/mi
Finish· 26.22 mi
3:56:28
Rank: #18655 (-53)
25.2M → Finish
9:30 | 9:19/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:39
Pace8:40 /mi
2nd Half
Distance13.11 mi
Time2:02:49
Pace9:22 /mi
📊Positive Split: 8.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:3626:538:3926:53
8:39
-
10K
6.21 mi11:50:1853:358:3726:42
8:36
-0:03
15K
9.32 mi12:17:061:20:238:3726:48
8:38
+0:02
20K
12.43 mi12:44:201:47:378:4027:14
8:46
+0:08
Half
13.11 mi12:50:221:53:398:406:02
8:51
+0:05
25K
15.53 mi13:12:072:15:248:4321:45
8:58
+0:07
30K
18.64 mi13:40:222:43:398:4728:15
9:06
+0:08
20M
20.00 mi13:52:542:56:118:4912:32
9:13
+0:07
21M
21.00 mi14:02:473:06:048:529:53
9:53
+0:40
35K
21.75 mi14:09:413:12:588:526:54
9:13
-0:40
23M
23.00 mi14:21:543:25:118:5512:13
9:45
+0:32
24M
24.00 mi14:31:373:34:548:579:43
9:43
-0:02
40K
24.85 mi14:40:013:43:188:598:24
9:49
+0:06
25.2M
25.20 mi14:43:413:46:589:003:40
10:38
+0:49
Finish
26.22 mi14:53:113:56:289:029:30
9:19
-1:19

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

8:36 /mi

Average Pace

9:02 /mi

Slowest Pace

10:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:53:39

48% of race

Time at Steady Pace

1:18:56

33% of race

Time at Slower Pace

43:53

19% of race

Average Pace: 9:01 /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 mi11:23:3626:538:3926:53
8:39
#18610
10K
6.21 mi11:50:1853:358:3726:42
8:36
#18661
15K
9.32 mi12:17:061:20:238:3726:48
8:38
#18614
20K
12.43 mi12:44:201:47:378:4027:14
8:46
#18577
Half
13.11 mi12:50:221:53:398:406:02
8:51
#18638
25K
15.53 mi13:12:072:15:248:4321:45
8:58
#18673
30K
18.64 mi13:40:222:43:398:4728:15
9:06
#18454
20M
20.00 mi13:52:542:56:118:4912:32
9:13
#18390
21M
21.00 mi14:02:473:06:048:529:53
9:53
#18340
35K
21.75 mi14:09:413:12:588:526:54
9:13
#18346
23M
23.00 mi14:21:543:25:118:5512:13
9:45
#18420
24M
24.00 mi14:31:373:34:548:579:43
9:43
#18518
40K
24.85 mi14:40:013:43:188:598:24
9:49
#18572
25.2M
25.20 mi14:43:413:46:589:003:40
10:38
#18602
Finish
26.22 mi14:53:113:56:289:029:30
9:19
#18655
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi186106946694618616(Top 70%)6869(Top 60%)6869(Top 569%)
10K6.21 mi3.10 mi18661-516922+246922+2418822(Top 71%)6978(Top 61%)6978(Top 578%)
15K9.32 mi3.11 mi18614+476892+306892+3018616(Top 70%)6869(Top 60%)6869(Top 569%)
20K12.43 mi3.11 mi18577+376852+406852+4018505(Top 70%)6797(Top 60%)6797(Top 563%)
Half13.11 mi0.68 mi18638-616896-446896-4419792(Top 74%)7561(Top 66%)7561(Top 626%)
25K15.53 mi2.42 mi18673-356938-426938-4218835(Top 71%)7037(Top 62%)7037(Top 583%)
30K18.64 mi3.11 mi18454+2196842+966842+9617663(Top 66%)6450(Top 56%)6450(Top 534%)
20M20.00 mi1.36 mi18390+646806+366806+3617690(Top 66%)6579(Top 58%)6579(Top 545%)
21M21.00 mi1.00 mi18340+506792+146792+1417626(Top 66%)6547(Top 57%)6547(Top 542%)
35K21.75 mi0.75 mi18346-66802-106802-1018889(Top 71%)7342(Top 64%)7342(Top 608%)
23M23.00 mi1.25 mi18420-746865-636865-6319315(Top 73%)7598(Top 67%)7598(Top 629%)
24M24.00 mi1.00 mi18518-986918-536918-5319983(Top 75%)7972(Top 70%)7972(Top 660%)
40K24.85 mi0.85 mi18572-546963-456963-4519496(Top 73%)7776(Top 68%)7776(Top 644%)
25.2M25.20 mi0.35 mi18602-306983-206983-2019588(Top 74%)7852(Top 69%)7852(Top 651%)
Finish26.22 mi1.02 mi18655-537023-407023-4019491(Top 73%)7734(Top 68%)7734(Top 641%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21stories
+97ft-345ft

Overall

18616

Females

6869

F50-54

6869

5K→10K

3.1 - 6.2 mi

Top 71%
×5stories
+79ft-138ft

Overall

18822

Females

6978

F50-54

6978

10K→15K

6.2 - 9.3 mi

Top 70%
×3stories
+67ft-78ft

Overall

18616

Females

6869

F50-54

6869

15K→20K

9.3 - 12.4 mi

Top 70%
×5stories
+106ft-86ft

Overall

18505

Females

6797

F50-54

6797

20K→Half

12.4 - 13.1 mi

Top 74%
×2stories
+19ft-37ft

Overall

19792

Females

7561

F50-54

7561

Half→25K

13.1 - 15.5 mi

Top 71%
×4stories
+66ft-88ft

Overall

18835

Females

7037

F50-54

7037

25K→30K

15.5 - 18.6 mi

Top 66%
×9stories
+181ft-148ft

Overall

17663

Females

6450

F50-54

6450

30K→20M

18.6 - 20.0 mi

Top 66%
×5stories
+64ft-50ft

Overall

17690

Females

6579

F50-54

6579

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

17626

Females

6547

F50-54

6547

21M→35K

21.0 - 21.8 mi

Top 71%
×7stories
+17ft-86ft

Overall

18889

Females

7342

F50-54

7342

35K→23M

21.8 - 23.0 mi

Top 73%
×5stories
+23ft-63ft

Overall

19315

Females

7598

F50-54

7598

23M→24M

23.0 - 24.0 mi

Top 75%
×6stories
+12ft-82ft

Overall

19983

Females

7972

F50-54

7972

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

19496

Females

7776

F50-54

7776

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

19588

Females

7852

F50-54

7852

25.2M→Finish

25.2 - 26.2 mi

Top 73%
×2stories
+22ft-21ft

Overall

19491

Females

7734

F50-54

7734

Passing Analysis

Category:
Athletes Passed
1536
Passed By
1581
Net Change
-45
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18610
5K → 10K310361-51#18610#18661
10K → 15K201154+47#18661#18614
15K → 20K177140+37#18614#18577
20K → Half1172-61#18577#18638
Half → 25K119154-35#18638#18673
25K → 30K28566+219#18673#18454
30K → 20M11955+64#18454#18390
20M → 21M11262+50#18390#18340
21M → 35K3844-6#18340#18346
35K → 23M57131-74#18346#18420
23M → 24M26124-98#18420#18518
24M → 40K3791-54#18518#18572
40K → 25.2M1444-30#18572#18602
25.2M → Finish3083-53#18602#18655
TOTALS15361581-45
📊

Passing Visuals

Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing