Boston Marathon logo
BOSTON MARATHON 2023

Heidi Endersen

Bib: 17618•F

IN

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:31
Rank: #13188
Start → 5K
24:31 | 7:53/mi
10K· 6.21 mi
47:51
Rank: #11829 (+1359)
5K → 10K
23:20 | 7:31/mi
15K· 9.32 mi
1:11:23
Rank: #11446 (+383)
10K → 15K
23:32 | 7:34/mi
20K· 12.43 mi
1:37:20
Rank: #12693 (-1247)
15K → 20K
25:57 | 8:21/mi
Half· 13.11 mi
1:42:51
Rank: #12823 (-130)
20K → Half
5:31 | 8:05/mi
25K· 15.53 mi
2:04:49
Rank: #14158 (-1335)
Half → 25K
21:58 | 9:04/mi
30K· 18.64 mi
2:34:20
Rank: #15334 (-1176)
25K → 30K
29:31 | 9:30/mi
20M
2:47:40
Rank: #15771 (-437)
30K → 20M
13:20 | 9:49/mi
21M
2:57:55
Rank: #16008 (-237)
20M → 21M
10:15 | 10:15/mi
35K· 21.75 mi
3:04:28
Rank: #16030 (-22)
21M → 35K
6:33 | 8:45/mi
23M
3:17:47
Rank: #16591 (-561)
35K → 23M
13:19 | 10:38/mi
24M
3:27:22
Rank: #16748 (-157)
23M → 24M
9:35 | 9:35/mi
40K· 24.85 mi
3:36:21
Rank: #17029 (-281)
24M → 40K
8:59 | 10:30/mi
25.2M
3:39:46
Rank: #17033 (-4)
40K → 25.2M
3:25 | 9:54/mi
Finish· 26.22 mi
3:49:22
Rank: #17206 (-173)
25.2M → Finish
9:36 | 9:25/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
Time1:42:51
Pace7:51 /mi
2nd Half
Distance13.11 mi
Time2:06:31
Pace9:39 /mi
📊Positive Split: 23.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:5824:317:5324:31
7:53
-
10K
6.21 mi11:39:1847:517:4223:20
7:31
-0:22
15K
9.32 mi12:02:501:11:237:4023:32
7:34
+0:03
20K
12.43 mi12:28:471:37:207:5025:57
8:21
+0:47
Half
13.11 mi12:34:181:42:517:515:31
8:05
-0:16
25K
15.53 mi12:56:162:04:498:0221:58
9:04
+0:59
30K
18.64 mi13:25:472:34:208:1729:31
9:30
+0:26
20M
20.00 mi13:39:072:47:408:2313:20
9:49
+0:19
21M
21.00 mi13:49:222:57:558:2810:15
10:15
+0:26
35K
21.75 mi13:55:553:04:288:296:33
8:45
-1:30
23M
23.00 mi14:09:143:17:478:3613:19
10:38
+1:53
24M
24.00 mi14:18:493:27:228:389:35
9:35
-1:03
40K
24.85 mi14:27:483:36:218:428:59
10:30
+0:55
25.2M
25.20 mi14:31:133:39:468:433:25
9:54
-0:36
Finish
26.22 mi14:40:493:49:228:459:36
9:25
-0:29

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

7:31 /mi

Average Pace

8:45 /mi

Slowest Pace

10:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:49:24

48% of race

Time at Steady Pace

1:27:25

38% of race

Time at Slower Pace

32:33

14% of race

Average Pace: 8:45 /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 mi11:15:5824:317:5324:31
7:53
#13188
10K
6.21 mi11:39:1847:517:4223:20
7:31
#11829
15K
9.32 mi12:02:501:11:237:4023:32
7:34
#11446
20K
12.43 mi12:28:471:37:207:5025:57
8:21
#12693
Half
13.11 mi12:34:181:42:517:515:31
8:05
#12823
25K
15.53 mi12:56:162:04:498:0221:58
9:04
#14158
30K
18.64 mi13:25:472:34:208:1729:31
9:30
#15334
20M
20.00 mi13:39:072:47:408:2313:20
9:49
#15771
21M
21.00 mi13:49:222:57:558:2810:15
10:15
#16008
35K
21.75 mi13:55:553:04:288:296:33
8:45
#16030
23M
23.00 mi14:09:143:17:478:3613:19
10:38
#16591
24M
24.00 mi14:18:493:27:228:389:35
9:35
#16748
40K
24.85 mi14:27:483:36:218:428:59
10:30
#17029
25.2M
25.20 mi14:31:133:39:468:433:25
9:54
#17033
Finish
26.22 mi14:40:493:49:228:459:36
9:25
#17206
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi131883552355210816(Top 41%)2246(Top 20%)2246(Top 46%)
10K6.21 mi3.10 mi11829+13592782+7702782+77010550(Top 40%)2087(Top 18%)2087(Top 43%)
15K9.32 mi3.11 mi11446+3832574+2082574+20810816(Top 41%)2246(Top 20%)2246(Top 46%)
20K12.43 mi3.11 mi12693-12473305-7313305-73115962(Top 60%)5328(Top 47%)5328(Top 109%)
Half13.11 mi0.68 mi12823-1303378-733378-7315135(Top 57%)4780(Top 42%)4780(Top 98%)
25K15.53 mi2.42 mi14158-13354202-8244202-82419242(Top 72%)7272(Top 64%)7272(Top 149%)
30K18.64 mi3.11 mi15334-11764971-7694971-76919446(Top 73%)7440(Top 65%)7440(Top 152%)
20M20.00 mi1.36 mi15771-4375255-2845255-28419896(Top 75%)7791(Top 68%)7791(Top 160%)
21M21.00 mi1.00 mi16008-2375422-1675422-16718885(Top 71%)7269(Top 64%)7269(Top 149%)
35K21.75 mi0.75 mi16030-225454-325454-3216750(Top 63%)6138(Top 54%)6138(Top 126%)
23M23.00 mi1.25 mi16591-5615786-3325786-33221631(Top 81%)8863(Top 78%)8863(Top 181%)
24M24.00 mi1.00 mi16748-1575893-1075893-10719503(Top 73%)7713(Top 68%)7713(Top 158%)
40K24.85 mi0.85 mi17029-2816081-1886081-18821234(Top 80%)8737(Top 76%)8737(Top 179%)
25.2M25.20 mi0.35 mi17033-46084-36084-317062(Top 64%)6454(Top 57%)6454(Top 132%)
Finish26.22 mi1.02 mi17206-1736190-1066190-10619848(Top 75%)7905(Top 69%)7905(Top 162%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21stories
+97ft-345ft

Overall

10816

Females

2246

F18-39

2246

5K→10K

3.1 - 6.2 mi

Top 40%
×5stories
+79ft-138ft

Overall

10550

Females

2087

F18-39

2087

10K→15K

6.2 - 9.3 mi

Top 41%
×3stories
+67ft-78ft

Overall

10816

Females

2246

F18-39

2246

15K→20K

9.3 - 12.4 mi

Top 60%
×5stories
+106ft-86ft

Overall

15962

Females

5328

F18-39

5328

20K→Half

12.4 - 13.1 mi

Top 57%
×2stories
+19ft-37ft

Overall

15135

Females

4780

F18-39

4780

Half→25K

13.1 - 15.5 mi

Top 72%
×4stories
+66ft-88ft

Overall

19242

Females

7272

F18-39

7272

25K→30K

15.5 - 18.6 mi

Top 73%
×9stories
+181ft-148ft

Overall

19446

Females

7440

F18-39

7440

30K→20M

18.6 - 20.0 mi

Top 75%
×5stories
+64ft-50ft

Overall

19896

Females

7791

F18-39

7791

20M→21M

20.0 - 21.0 mi

Top 71%
×8stories
+106ft-24ft

Overall

18885

Females

7269

F18-39

7269

21M→35K

21.0 - 21.8 mi

Top 63%
×7stories
+17ft-86ft

Overall

16750

Females

6138

F18-39

6138

35K→23M

21.8 - 23.0 mi

Top 81%
×5stories
+23ft-63ft

Overall

21631

Females

8863

F18-39

8863

23M→24M

23.0 - 24.0 mi

Top 73%
×6stories
+12ft-82ft

Overall

19503

Females

7713

F18-39

7713

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

21234

Females

8737

F18-39

8737

40K→25.2M

24.9 - 25.2 mi

Top 64%
×1story
+13ft-16ft

Overall

17062

Females

6454

F18-39

6454

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2stories
+22ft-21ft

Overall

19848

Females

7905

F18-39

7905

Passing Analysis

Category:
Athletes Passed
2077
Passed By
6095
Net Change
-4018
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13188
5K → 10K139334+1359#13188#11829
10K → 15K43451+383#11829#11446
15K → 20K141261-1247#11446#12693
20K → Half11141-130#12693#12823
Half → 25K71342-1335#12823#14158
25K → 30K231199-1176#14158#15334
30K → 20M17454-437#15334#15771
20M → 21M32269-237#15771#16008
21M → 35K4971-22#16008#16030
35K → 23M9570-561#16030#16591
23M → 24M32189-157#16591#16748
24M → 40K12293-281#16748#17029
40K → 25.2M2226-4#17029#17033
25.2M → Finish22195-173#17033#17206
TOTALS20776095-4018
📊

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