Boston Marathon logo
BOSTON MARATHON 2023

Karla Nasra

Bib: 13141•F

QC

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 33%
Gender (Female)
#0 / 11423
Top 13%
Division (F18-39)
#0 / 4884
Top 24%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:42
Rank: #8151
Start → 5K
22:42 | 7:18/mi
10K· 6.21 mi
44:58
Rank: #8024 (+127)
5K → 10K
22:16 | 7:10/mi
15K· 9.32 mi
1:07:22
Rank: #7968 (+56)
10K → 15K
22:24 | 7:13/mi
20K· 12.43 mi
1:30:19
Rank: #8025 (-57)
15K → 20K
22:57 | 7:23/mi
Half· 13.11 mi
1:35:17
Rank: #8031 (-6)
20K → Half
4:58 | 7:17/mi
25K· 15.53 mi
1:53:21
Rank: #8047 (-16)
Half → 25K
18:04 | 7:27/mi
30K· 18.64 mi
2:16:58
Rank: #8005 (+42)
25K → 30K
23:37 | 7:36/mi
20M
2:27:30
Rank: #7978 (+27)
30K → 20M
10:32 | 7:45/mi
21M
2:35:55
Rank: #8069 (-91)
20M → 21M
8:25 | 8:25/mi
35K· 21.75 mi
2:41:33
Rank: #8088 (-19)
21M → 35K
5:38 | 7:32/mi
23M
2:51:57
Rank: #8289 (-201)
35K → 23M
10:24 | 8:18/mi
24M
3:00:00
Rank: #8402 (-113)
23M → 24M
8:03 | 8:03/mi
40K· 24.85 mi
3:06:50
Rank: #8447 (-45)
24M → 40K
6:50 | 8:00/mi
25.2M
3:10:07
Rank: #8572 (-125)
40K → 25.2M
3:17 | 9:31/mi
Finish· 26.22 mi
3:18:12
Rank: #8658 (-86)
25.2M → Finish
8:05 | 7:56/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
Time1:35:17
Pace7:16 /mi
2nd Half
Distance13.11 mi
Time1:42:55
Pace7:51 /mi
📊Positive Split: 8.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:2522:427:1822:42
7:18
-
10K
6.21 mi11:13:4144:587:1422:16
7:10
-0:08
15K
9.32 mi11:36:051:07:227:1422:24
7:13
+0:03
20K
12.43 mi11:59:021:30:197:1622:57
7:23
+0:10
Half
13.11 mi12:04:001:35:177:164:58
7:17
-0:06
25K
15.53 mi12:22:041:53:217:1818:04
7:27
+0:10
30K
18.64 mi12:45:412:16:587:2123:37
7:36
+0:09
20M
20.00 mi12:56:132:27:307:2210:32
7:45
+0:09
21M
21.00 mi13:04:382:35:557:258:25
8:25
+0:40
35K
21.75 mi13:10:162:41:337:265:38
7:32
-0:53
23M
23.00 mi13:20:402:51:577:2910:24
8:18
+0:46
24M
24.00 mi13:28:433:00:007:308:03
8:03
-0:15
40K
24.85 mi13:35:333:06:507:316:50
8:00
-0:03
25.2M
25.20 mi13:38:503:10:077:333:17
9:31
+1:31
Finish
26.22 mi13:46:553:18:127:348:05
7:56
-1:35

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

7:10 /mi

Average Pace

7:34 /mi

Slowest Pace

9:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:12:20

36% of race

Time at Steady Pace

1:20:48

41% of race

Time at Slower Pace

45:04

23% of race

Average Pace: 7:34 /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 mi10:51:2522:427:1822:42
7:18
#8151
10K
6.21 mi11:13:4144:587:1422:16
7:10
#8024
15K
9.32 mi11:36:051:07:227:1422:24
7:13
#7968
20K
12.43 mi11:59:021:30:197:1622:57
7:23
#8025
Half
13.11 mi12:04:001:35:177:164:58
7:17
#8031
25K
15.53 mi12:22:041:53:217:1818:04
7:27
#8047
30K
18.64 mi12:45:412:16:587:2123:37
7:36
#8005
20M
20.00 mi12:56:132:27:307:2210:32
7:45
#7978
21M
21.00 mi13:04:382:35:557:258:25
8:25
#8069
35K
21.75 mi13:10:162:41:337:265:38
7:32
#8088
23M
23.00 mi13:20:402:51:577:2910:24
8:18
#8289
24M
24.00 mi13:28:433:00:007:308:03
8:03
#8402
40K
24.85 mi13:35:333:06:507:316:50
8:00
#8447
25.2M
25.20 mi13:38:503:10:077:333:17
9:31
#8572
Finish
26.22 mi13:46:553:18:127:348:05
7:56
#8658
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi8151106710677879(Top 30%)1034(Top 9%)1034(Top 21%)
10K6.21 mi3.10 mi8024+1271040+271040+277893(Top 30%)1018(Top 9%)1018(Top 21%)
15K9.32 mi3.11 mi7968+561024+161024+167879(Top 30%)1034(Top 9%)1034(Top 21%)
20K12.43 mi3.11 mi8025-571065-411065-418422(Top 32%)1272(Top 11%)1272(Top 26%)
Half13.11 mi0.68 mi8031-61070-51070-58513(Top 32%)1292(Top 11%)1292(Top 26%)
25K15.53 mi2.42 mi8047-161091-211091-218442(Top 32%)1346(Top 12%)1346(Top 28%)
30K18.64 mi3.11 mi8005+421117-261117-267958(Top 30%)1290(Top 11%)1290(Top 26%)
20M20.00 mi1.36 mi7978+271125-81125-88527(Top 32%)1605(Top 14%)1605(Top 33%)
21M21.00 mi1.00 mi8069-911175-501175-509970(Top 37%)2362(Top 21%)2362(Top 48%)
35K21.75 mi0.75 mi8088-191199-241199-248765(Top 33%)1798(Top 16%)1798(Top 37%)
23M23.00 mi1.25 mi8289-2011286-871286-8711931(Top 45%)3469(Top 30%)3469(Top 71%)
24M24.00 mi1.00 mi8402-1131355-691355-6911587(Top 44%)3365(Top 29%)3365(Top 69%)
40K24.85 mi0.85 mi8447-451393-381393-3810004(Top 38%)2641(Top 23%)2641(Top 54%)
25.2M25.20 mi0.35 mi8572-1251445-521445-5215281(Top 57%)5442(Top 48%)5442(Top 111%)
Finish26.22 mi1.02 mi8658-861508-631508-6311626(Top 44%)3497(Top 31%)3497(Top 72%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 30%
×21stories
+97ft-345ft

Overall

7879

Females

1034

F18-39

1034

5K→10K

3.1 - 6.2 mi

Top 30%
×5stories
+79ft-138ft

Overall

7893

Females

1018

F18-39

1018

10K→15K

6.2 - 9.3 mi

Top 30%
×3stories
+67ft-78ft

Overall

7879

Females

1034

F18-39

1034

15K→20K

9.3 - 12.4 mi

Top 32%
×5stories
+106ft-86ft

Overall

8422

Females

1272

F18-39

1272

20K→Half

12.4 - 13.1 mi

Top 32%
×2stories
+19ft-37ft

Overall

8513

Females

1292

F18-39

1292

Half→25K

13.1 - 15.5 mi

Top 32%
×4stories
+66ft-88ft

Overall

8442

Females

1346

F18-39

1346

25K→30K

15.5 - 18.6 mi

Top 30%
×9stories
+181ft-148ft

Overall

7958

Females

1290

F18-39

1290

30K→20M

18.6 - 20.0 mi

Top 32%
×5stories
+64ft-50ft

Overall

8527

Females

1605

F18-39

1605

20M→21M

20.0 - 21.0 mi

Top 37%
×8stories
+106ft-24ft

Overall

9970

Females

2362

F18-39

2362

21M→35K

21.0 - 21.8 mi

Top 33%
×7stories
+17ft-86ft

Overall

8765

Females

1798

F18-39

1798

35K→23M

21.8 - 23.0 mi

Top 45%
×5stories
+23ft-63ft

Overall

11931

Females

3469

F18-39

3469

23M→24M

23.0 - 24.0 mi

Top 44%
×6stories
+12ft-82ft

Overall

11587

Females

3365

F18-39

3365

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10004

Females

2641

F18-39

2641

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

15281

Females

5442

F18-39

5442

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2stories
+22ft-21ft

Overall

11626

Females

3497

F18-39

3497

Passing Analysis

Category:
Athletes Passed
1178
Passed By
1685
Net Change
-507
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8151
5K → 10K301174+127#8151#8024
10K → 15K166110+56#8024#7968
15K → 20K108165-57#7968#8025
20K → Half2127-6#8025#8031
Half → 25K93109-16#8031#8047
25K → 30K152110+42#8047#8005
30K → 20M9871+27#8005#7978
20M → 21M47138-91#7978#8069
21M → 35K3453-19#8069#8088
35K → 23M34235-201#8088#8289
23M → 24M39152-113#8289#8402
24M → 40K4085-45#8402#8447
40K → 25.2M9134-125#8447#8572
25.2M → Finish36122-86#8572#8658
TOTALS11781685-507
📊

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