Boston Marathon logo
BOSTON MARATHON 2023

Amy Critchlow

Bib: 14590•F

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 36%
Gender (Female)
#0 / 11423
Top 16%
Division (F18-39)
#0 / 4884
Top 29%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:38/mi
23:43
↑ 97↓ 3451.5%
10K· 6.21 mi
7:43/mi
47:40
↑ 79↓ 1380.4%
15K· 9.32 mi
7:39/mi
1:11:26
↑ 67↓ 78
20K· 12.43 mi
7:40/mi
1:35:14
↑ 106↓ 860.1%
Half· 13.11 mi
7:21/mi
1:40:15
↑ 19↓ 370.5%
25K· 15.53 mi
7:44/mi
1:59:01
↑ 66↓ 880.2%
30K· 18.64 mi
7:50/mi
2:23:21
↑ 181↓ 1480.2%
20M
7:54/mi
2:34:05
↑ 64↓ 500.2%
21M
7:54/mi
2:41:59
↑ 106↓ 241.6%
35K· 21.75 mi
7:30/mi
2:47:36
↑ 17↓ 861.7%
23M
7:45/mi
2:57:18
↑ 23↓ 630.6%
24M
7:32/mi
3:04:50
↓ 821.3%
40K· 24.85 mi
7:34/mi
3:11:18
↓ 200.3%
25.2M
7:53/mi
3:14:01
↑ 13↓ 160.2%
Finish· 26.22 mi
6:59/mi
3:21:08
↑ 22↓ 21

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
Time1:40:15
Pace7:39 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:40:53
Pace7:42 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:1523:437:3823:43
7:38
-
10K
6.21 mi11:17:1247:407:4023:57
7:43
+0:05
15K
9.32 mi11:40:581:11:267:4023:46
7:39
-0:04
20K
12.43 mi12:04:461:35:147:4023:48
7:40
+0:01
Half
13.11 mi12:09:471:40:157:395:01
7:21
-0:19
25K
15.53 mi12:28:331:59:017:4018:46
7:44
+0:23
30K
18.64 mi12:52:532:23:217:4124:20
7:50
+0:06
20M
20.00 mi13:03:372:34:057:4210:44
7:54
+0:04
21M
21.00 mi13:11:312:41:597:437:54
7:54
0:00
35K
21.75 mi13:17:082:47:367:425:37
7:30
-0:24
23M
23.00 mi13:26:502:57:187:439:42
7:45
+0:15
24M
24.00 mi13:34:223:04:507:427:32
7:32
-0:13
40K
24.85 mi13:40:503:11:187:426:28
7:34
+0:02
25.2M
25.20 mi13:43:333:14:017:422:43
7:53
+0:19
Finish
26.22 mi13:50:403:21:087:417:07
6:59
-0:54

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

6:59 /mi

Average Pace

7:41 /mi

Slowest Pace

7:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:43:02

51% of race

Time at Steady Pace

1:38:06

49% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:40 /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 mi10:53:1523:437:3823:43
7:38
#10858
10K
6.21 mi11:17:1247:407:4023:57
7:43
#11539
15K
9.32 mi11:40:581:11:267:4023:46
7:39
#11485
20K
12.43 mi12:04:461:35:147:4023:48
7:40
#11215
Half
13.11 mi12:09:471:40:157:395:01
7:21
#11100
25K
15.53 mi12:28:331:59:017:4018:46
7:44
#10997
30K
18.64 mi12:52:532:23:217:4124:20
7:50
#10682
20M
20.00 mi13:03:372:34:057:4210:44
7:54
#10588
21M
21.00 mi13:11:312:41:597:437:54
7:54
#10334
35K
21.75 mi13:17:082:47:367:425:37
7:30
#10252
23M
23.00 mi13:26:502:57:187:439:42
7:45
#10082
24M
24.00 mi13:34:223:04:507:427:32
7:32
#9948
40K
24.85 mi13:40:503:11:187:426:28
7:34
#9809
25.2M
25.20 mi13:43:333:14:017:422:43
7:53
#9715
Finish
26.22 mi13:50:403:21:087:417:07
6:59
#9487
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi108582254225411417(Top 43%)2574(Top 23%)2574(Top 53%)
10K6.21 mi3.10 mi11539-6812622-3682622-36812339(Top 46%)3053(Top 27%)3053(Top 63%)
15K9.32 mi3.11 mi11485+542590+322590+3211417(Top 43%)2574(Top 23%)2574(Top 53%)
20K12.43 mi3.11 mi11215+2702446+1442446+14410597(Top 40%)2196(Top 19%)2196(Top 45%)
Half13.11 mi0.68 mi11100+1152385+612385+619101(Top 34%)1525(Top 13%)1525(Top 31%)
25K15.53 mi2.42 mi10997+1032351+342351+3410620(Top 40%)2290(Top 20%)2290(Top 47%)
30K18.64 mi3.11 mi10682+3152245+1062245+1069612(Top 36%)1977(Top 17%)1977(Top 40%)
20M20.00 mi1.36 mi10588+942217+282217+289596(Top 36%)2071(Top 18%)2071(Top 42%)
21M21.00 mi1.00 mi10334+2542113+1042113+1046684(Top 25%)1026(Top 9%)1026(Top 21%)
35K21.75 mi0.75 mi10252+822090+232090+238622(Top 32%)1741(Top 15%)1741(Top 36%)
23M23.00 mi1.25 mi10082+1702038+522038+528084(Top 30%)1628(Top 14%)1628(Top 33%)
24M24.00 mi1.00 mi9948+1342004+342004+347964(Top 30%)1664(Top 15%)1664(Top 34%)
40K24.85 mi0.85 mi9809+1391973+311973+317144(Top 27%)1431(Top 13%)1431(Top 29%)
25.2M25.20 mi0.35 mi9715+941936+371936+375908(Top 22%)1039(Top 9%)1039(Top 21%)
Finish26.22 mi1.02 mi9487+2281859+771859+775149(Top 19%)786(Top 7%)786(Top 16%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 43%
×21story building
+97ft-345ft

Overall

11417

Females

2574

F18-39

2574

5K→10K

3.1 - 6.2 mi

Top 46%
×5story building
+79ft-138ft

Overall

12339

Females

3053

F18-39

3053

10K→15K

6.2 - 9.3 mi

Top 43%
×3story building
+67ft-78ft

Overall

11417

Females

2574

F18-39

2574

15K→20K

9.3 - 12.4 mi

Top 40%
×5story building
+106ft-86ft

Overall

10597

Females

2196

F18-39

2196

20K→Half

12.4 - 13.1 mi

Top 34%
×2story building
+19ft-37ft

Overall

9101

Females

1525

F18-39

1525

Half→25K

13.1 - 15.5 mi

Top 40%
×4story building
+66ft-88ft

Overall

10620

Females

2290

F18-39

2290

25K→30K

15.5 - 18.6 mi

Top 36%
×9story building
+181ft-148ft

Overall

9612

Females

1977

F18-39

1977

30K→20M

18.6 - 20.0 mi

Top 36%
×5story building
+64ft-50ft

Overall

9596

Females

2071

F18-39

2071

20M→21M

20.0 - 21.0 mi

Top 25%
×8story building
+106ft-24ft

Overall

6684

Females

1026

F18-39

1026

21M→35K

21.0 - 21.8 mi

Top 32%
×7story building
+17ft-86ft

Overall

8622

Females

1741

F18-39

1741

35K→23M

21.8 - 23.0 mi

Top 30%
×5story building
+23ft-63ft

Overall

8084

Females

1628

F18-39

1628

23M→24M

23.0 - 24.0 mi

Top 30%
×6story building
+12ft-82ft

Overall

7964

Females

1664

F18-39

1664

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7144

Females

1431

F18-39

1431

40K→25.2M

24.9 - 25.2 mi

Top 22%
×1story
+13ft-16ft

Overall

5908

Females

1039

F18-39

1039

25.2M→Finish

25.2 - 26.2 mi

Top 19%
×2story building
+22ft-21ft

Overall

5149

Females

786

F18-39

786

Passing Analysis

Category:
Athletes Passed
2557*
Passed By
1186
Net Change
+1371
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10858
5K → 10K101782-681#10858#11539
10K → 15K212158+54#11539#11485
15K → 20K31646+270#11485#11215
20K → Half1150+115#11215#11100
Half → 25K16461+103#11100#10997
25K → 30K36045+315#10997#10682
30K → 20M127*33+94#10682#10588
20M → 21M2573+254#10588#10334
21M → 35K9513+82#10334#10252
35K → 23M18414+170#10252#10082
23M → 24M15117+134#10082#9948
24M → 40K148*9+139#9948#9809
40K → 25.2M962+94#9809#9715
25.2M → Finish231*3+228#9715#9487
TOTALS2557*1186+1371

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

📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing