Boston Marathon logo
BOSTON MARATHON 2023

Natacha Rail

Bib: 16154•F

ON

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 44%
Gender (Female)
#0 / 11423
Top 26%
Division (F18-39)
#0 / 4884
Top 43%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:36
Rank: #13406
Start → 5K
24:36 | 7:55/mi
10K· 6.21 mi
49:16
Rank: #13813 (-407)
5K → 10K
24:40 | 7:56/mi
15K· 9.32 mi
1:14:01
Rank: #13912 (-99)
10K → 15K
24:45 | 7:58/mi
20K· 12.43 mi
1:38:38
Rank: #13598 (+314)
15K → 20K
24:37 | 7:55/mi
Half· 13.11 mi
1:43:52
Rank: #13502 (+96)
20K → Half
5:14 | 7:40/mi
25K· 15.53 mi
2:03:00
Rank: #13207 (+295)
Half → 25K
19:08 | 7:53/mi
30K· 18.64 mi
2:28:00
Rank: #12818 (+389)
25K → 30K
25:00 | 8:03/mi
20M
2:39:04
Rank: #12650 (+168)
30K → 20M
11:04 | 8:09/mi
21M
2:47:32
Rank: #12472 (+178)
20M → 21M
8:28 | 8:28/mi
35K· 21.75 mi
2:53:14
Rank: #12356 (+116)
21M → 35K
5:42 | 7:37/mi
23M
3:03:15
Rank: #12203 (+153)
35K → 23M
10:01 | 8:00/mi
24M
3:11:01
Rank: #12065 (+138)
23M → 24M
7:46 | 7:46/mi
40K· 24.85 mi
3:17:38
Rank: #11902 (+163)
24M → 40K
6:37 | 7:44/mi
25.2M
3:20:30
Rank: #11837 (+65)
40K → 25.2M
2:52 | 8:19/mi
Finish· 26.22 mi
3:28:04
Rank: #11642 (+195)
25.2M → Finish
7:34 | 7:26/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 Half⚖️ Balanced
Distance13.11 mi
Time1:43:52
Pace7:55 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:44:12
Pace7:57 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:3924:367:5524:36
7:55
-
10K
6.21 mi11:45:1949:167:5624:40
7:56
+0:01
15K
9.32 mi12:10:041:14:017:5624:45
7:58
+0:02
20K
12.43 mi12:34:411:38:387:5624:37
7:55
-0:03
Half
13.11 mi12:39:551:43:527:555:14
7:40
-0:15
25K
15.53 mi12:59:032:03:007:5519:08
7:53
+0:13
30K
18.64 mi13:24:032:28:007:5625:00
8:03
+0:10
20M
20.00 mi13:35:072:39:047:5711:04
8:09
+0:06
21M
21.00 mi13:43:352:47:327:598:28
8:28
+0:19
35K
21.75 mi13:49:172:53:147:585:42
7:37
-0:51
23M
23.00 mi13:59:183:03:157:5810:01
8:00
+0:23
24M
24.00 mi14:07:043:11:017:587:46
7:46
-0:14
40K
24.85 mi14:13:413:17:387:576:37
7:44
-0:02
25.2M
25.20 mi14:16:333:20:307:572:52
8:19
+0:35
Finish
26.22 mi14:24:073:28:047:567:34
7:26
-0:53

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

7:26 /mi

Average Pace

7:56 /mi

Slowest Pace

8:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:16:44

95% of race

Time at Steady Pace

11:20

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:56 /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 mi11:20:3924:367:5524:36
7:55
#13406
10K
6.21 mi11:45:1949:167:5624:40
7:56
#13813
15K
9.32 mi12:10:041:14:017:5624:45
7:58
#13912
20K
12.43 mi12:34:411:38:387:5624:37
7:55
#13598
Half
13.11 mi12:39:551:43:527:555:14
7:40
#13502
25K
15.53 mi12:59:032:03:007:5519:08
7:53
#13207
30K
18.64 mi13:24:032:28:007:5625:00
8:03
#12818
20M
20.00 mi13:35:072:39:047:5711:04
8:09
#12650
21M
21.00 mi13:43:352:47:327:598:28
8:28
#12472
35K
21.75 mi13:49:172:53:147:585:42
7:37
#12356
23M
23.00 mi13:59:183:03:157:5810:01
8:00
#12203
24M
24.00 mi14:07:043:11:017:587:46
7:46
#12065
40K
24.85 mi14:13:413:17:387:576:37
7:44
#11902
25.2M
25.20 mi14:16:333:20:307:572:52
8:19
#11837
Finish
26.22 mi14:24:073:28:047:567:34
7:26
#11642
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi134063668366814109(Top 53%)4145(Top 36%)4145(Top 85%)
10K6.21 mi3.10 mi13813-4073929-2613929-26114330(Top 54%)4252(Top 37%)4252(Top 87%)
15K9.32 mi3.11 mi13912-994004-754004-7514109(Top 53%)4145(Top 36%)4145(Top 85%)
20K12.43 mi3.11 mi13598+3143842+1623842+16212820(Top 48%)3446(Top 30%)3446(Top 71%)
Half13.11 mi0.68 mi13502+963782+603782+6011701(Top 44%)2745(Top 24%)2745(Top 56%)
25K15.53 mi2.42 mi13207+2953619+1633619+16311861(Top 45%)2993(Top 26%)2993(Top 61%)
30K18.64 mi3.11 mi12818+3893441+1783441+17811279(Top 42%)2779(Top 24%)2779(Top 57%)
20M20.00 mi1.36 mi12650+1683365+763365+7611325(Top 43%)2899(Top 25%)2899(Top 59%)
21M21.00 mi1.00 mi12472+1783282+833282+8310323(Top 39%)2550(Top 22%)2550(Top 52%)
35K21.75 mi0.75 mi12356+1163224+583224+589459(Top 36%)2136(Top 19%)2136(Top 44%)
23M23.00 mi1.25 mi12203+1533170+543170+549776(Top 37%)2403(Top 21%)2403(Top 49%)
24M24.00 mi1.00 mi12065+1383117+533117+539580(Top 36%)2390(Top 21%)2390(Top 49%)
40K24.85 mi0.85 mi11902+1633040+773040+778297(Top 31%)1879(Top 16%)1879(Top 38%)
25.2M25.20 mi0.35 mi11837+653009+313009+318493(Top 32%)2044(Top 18%)2044(Top 42%)
Finish26.22 mi1.02 mi11642+1952930+792930+798011(Top 30%)1841(Top 16%)1841(Top 38%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21stories
+97ft-345ft

Overall

14109

Females

4145

F18-39

4145

5K→10K

3.1 - 6.2 mi

Top 54%
×5stories
+79ft-138ft

Overall

14330

Females

4252

F18-39

4252

10K→15K

6.2 - 9.3 mi

Top 53%
×3stories
+67ft-78ft

Overall

14109

Females

4145

F18-39

4145

15K→20K

9.3 - 12.4 mi

Top 48%
×5stories
+106ft-86ft

Overall

12820

Females

3446

F18-39

3446

20K→Half

12.4 - 13.1 mi

Top 44%
×2stories
+19ft-37ft

Overall

11701

Females

2745

F18-39

2745

Half→25K

13.1 - 15.5 mi

Top 45%
×4stories
+66ft-88ft

Overall

11861

Females

2993

F18-39

2993

25K→30K

15.5 - 18.6 mi

Top 42%
×9stories
+181ft-148ft

Overall

11279

Females

2779

F18-39

2779

30K→20M

18.6 - 20.0 mi

Top 43%
×5stories
+64ft-50ft

Overall

11325

Females

2899

F18-39

2899

20M→21M

20.0 - 21.0 mi

Top 39%
×8stories
+106ft-24ft

Overall

10323

Females

2550

F18-39

2550

21M→35K

21.0 - 21.8 mi

Top 36%
×7stories
+17ft-86ft

Overall

9459

Females

2136

F18-39

2136

35K→23M

21.8 - 23.0 mi

Top 37%
×5stories
+23ft-63ft

Overall

9776

Females

2403

F18-39

2403

23M→24M

23.0 - 24.0 mi

Top 36%
×6stories
+12ft-82ft

Overall

9580

Females

2390

F18-39

2390

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8297

Females

1879

F18-39

1879

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

8493

Females

2044

F18-39

2044

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2stories
+22ft-21ft

Overall

8011

Females

1841

F18-39

1841

Passing Analysis

Category:
Athletes Passed
2761
Passed By
997
Net Change
+1764
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13406
5K → 10K136543-407#13406#13813
10K → 15K141240-99#13813#13912
15K → 20K35642+314#13912#13598
20K → Half1015+96#13598#13502
Half → 25K31520+295#13502#13207
25K → 30K42738+389#13207#12818
30K → 20M19729+168#12818#12650
20M → 21M19921+178#12650#12472
21M → 35K1226+116#12472#12356
35K → 23M17421+153#12356#12203
23M → 24M15012+138#12203#12065
24M → 40K1696+163#12065#11902
40K → 25.2M727+65#11902#11837
25.2M → Finish2027+195#11837#11642
TOTALS2761997+1764
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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