Boston Marathon logo
BOSTON MARATHON 2023

Maria Carlson

Bib: 15581•F

CA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 30%
Gender (Female)
#0 / 11423
Top 11%
Division (F18-39)
#0 / 4884
Top 20%
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
7:22/mi
22:54
↑ 97↓ 3451.5%
10K· 6.21 mi
7:25/mi
45:56
↑ 79↓ 1380.4%
15K· 9.32 mi
7:25/mi
1:08:57
↑ 67↓ 78
20K· 12.43 mi
7:25/mi
1:32:00
↑ 106↓ 860.1%
Half· 13.11 mi
7:20/mi
1:37:00
↑ 19↓ 370.5%
25K· 15.53 mi
7:23/mi
1:54:53
↑ 66↓ 880.2%
30K· 18.64 mi
7:32/mi
2:18:16
↑ 181↓ 1480.2%
20M
7:44/mi
2:28:47
↑ 64↓ 500.2%
21M
8:13/mi
2:37:00
↑ 106↓ 241.6%
35K· 21.75 mi
7:20/mi
2:42:29
↑ 17↓ 861.7%
23M
7:38/mi
2:52:02
↑ 23↓ 630.6%
24M
7:17/mi
2:59:19
↓ 821.3%
40K· 24.85 mi
7:30/mi
3:05:44
↓ 200.3%
25.2M
7:50/mi
3:08:26
↑ 13↓ 160.2%
Finish· 26.22 mi
7:09/mi
3:15:43
↑ 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 HalfFaster
Distance13.11 mi
Time1:37:00
Pace7:24 /mi
2nd Half
Distance13.11 mi
Time1:38:43
Pace7:32 /mi
📊Positive Split: 1.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:0322:547:2222:54
7:22
-
10K
6.21 mi11:37:0545:567:2423:02
7:25
+0:03
15K
9.32 mi12:00:061:08:577:2423:01
7:25
0:00
20K
12.43 mi12:23:091:32:007:2423:03
7:25
0:00
Half
13.11 mi12:28:091:37:007:245:00
7:20
-0:05
25K
15.53 mi12:46:021:54:537:2417:53
7:23
+0:03
30K
18.64 mi13:09:252:18:167:2523:23
7:32
+0:09
20M
20.00 mi13:19:562:28:477:2610:31
7:44
+0:12
21M
21.00 mi13:28:092:37:007:298:13
8:13
+0:29
35K
21.75 mi13:33:382:42:297:285:29
7:20
-0:53
23M
23.00 mi13:43:112:52:027:299:33
7:38
+0:18
24M
24.00 mi13:50:282:59:197:287:17
7:17
-0:21
40K
24.85 mi13:56:533:05:447:286:25
7:30
+0:13
25.2M
25.20 mi13:59:353:08:267:292:42
7:50
+0:20
Finish
26.22 mi14:06:523:15:437:287:17
7:09
-0:41

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

7:09 /mi

Average Pace

7:28 /mi

Slowest Pace

8:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:07:30

96% of race

Time at Steady Pace

8:13

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:28 /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 mi11:14:0322:547:2222:54
7:22
#8609
10K
6.21 mi11:37:0545:567:2423:02
7:25
#9136
15K
9.32 mi12:00:061:08:577:2423:01
7:25
#9169
20K
12.43 mi12:23:091:32:007:2423:03
7:25
#9028
Half
13.11 mi12:28:091:37:007:245:00
7:20
#9018
25K
15.53 mi12:46:021:54:537:2417:53
7:23
#8810
30K
18.64 mi13:09:252:18:167:2523:23
7:32
#8503
20M
20.00 mi13:19:562:28:477:2610:31
7:44
#8475
21M
21.00 mi13:28:092:37:007:298:13
8:13
#8473
35K
21.75 mi13:33:382:42:297:285:29
7:20
#8429
23M
23.00 mi13:43:112:52:027:299:33
7:38
#8313
24M
24.00 mi13:50:282:59:197:287:17
7:17
#8173
40K
24.85 mi13:56:533:05:447:286:25
7:30
#8102
25.2M
25.20 mi13:59:353:08:267:292:42
7:50
#8039
Finish
26.22 mi14:06:523:15:437:287:17
7:09
#7932
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi8609123912399418(Top 35%)1585(Top 14%)1585(Top 32%)
10K6.21 mi3.10 mi9136-5271467-2281467-2289758(Top 37%)1709(Top 15%)1709(Top 35%)
15K9.32 mi3.11 mi9169-331486-191486-199418(Top 35%)1585(Top 14%)1585(Top 32%)
20K12.43 mi3.11 mi9028+1411452+341452+348676(Top 33%)1362(Top 12%)1362(Top 28%)
Half13.11 mi0.68 mi9018+10145214528864(Top 33%)1414(Top 12%)1414(Top 29%)
25K15.53 mi2.42 mi8810+2081378+741378+747833(Top 29%)1132(Top 10%)1132(Top 23%)
30K18.64 mi3.11 mi8503+3071301+771301+777415(Top 28%)1077(Top 9%)1077(Top 22%)
20M20.00 mi1.36 mi8475+281312-111312-118446(Top 32%)1570(Top 14%)1570(Top 32%)
21M21.00 mi1.00 mi8473+21328-161328-168710(Top 33%)1795(Top 16%)1795(Top 37%)
35K21.75 mi0.75 mi8429+441322+61322+67369(Top 28%)1244(Top 11%)1244(Top 25%)
23M23.00 mi1.25 mi8313+1161295+271295+277298(Top 27%)1295(Top 11%)1295(Top 27%)
24M24.00 mi1.00 mi8173+1401268+271268+276300(Top 24%)1019(Top 9%)1019(Top 21%)
40K24.85 mi0.85 mi8102+711260+81260+86789(Top 26%)1274(Top 11%)1274(Top 26%)
25.2M25.20 mi0.35 mi8039+631247+131247+135625(Top 21%)938(Top 8%)938(Top 19%)
Finish26.22 mi1.02 mi7932+1071232+151232+156127(Top 23%)1109(Top 10%)1109(Top 23%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21story building
+97ft-345ft

Overall

9418

Females

1585

F18-39

1585

5K→10K

3.1 - 6.2 mi

Top 37%
×5story building
+79ft-138ft

Overall

9758

Females

1709

F18-39

1709

10K→15K

6.2 - 9.3 mi

Top 35%
×3story building
+67ft-78ft

Overall

9418

Females

1585

F18-39

1585

15K→20K

9.3 - 12.4 mi

Top 33%
×5story building
+106ft-86ft

Overall

8676

Females

1362

F18-39

1362

20K→Half

12.4 - 13.1 mi

Top 33%
×2story building
+19ft-37ft

Overall

8864

Females

1414

F18-39

1414

Half→25K

13.1 - 15.5 mi

Top 29%
×4story building
+66ft-88ft

Overall

7833

Females

1132

F18-39

1132

25K→30K

15.5 - 18.6 mi

Top 28%
×9story building
+181ft-148ft

Overall

7415

Females

1077

F18-39

1077

30K→20M

18.6 - 20.0 mi

Top 32%
×5story building
+64ft-50ft

Overall

8446

Females

1570

F18-39

1570

20M→21M

20.0 - 21.0 mi

Top 33%
×8story building
+106ft-24ft

Overall

8710

Females

1795

F18-39

1795

21M→35K

21.0 - 21.8 mi

Top 28%
×7story building
+17ft-86ft

Overall

7369

Females

1244

F18-39

1244

35K→23M

21.8 - 23.0 mi

Top 27%
×5story building
+23ft-63ft

Overall

7298

Females

1295

F18-39

1295

23M→24M

23.0 - 24.0 mi

Top 24%
×6story building
+12ft-82ft

Overall

6300

Females

1019

F18-39

1019

24M→40K

24.0 - 24.9 mi

Top 26%
×1story
+6ft-20ft

Overall

6789

Females

1274

F18-39

1274

40K→25.2M

24.9 - 25.2 mi

Top 21%
×1story
+13ft-16ft

Overall

5625

Females

938

F18-39

938

25.2M→Finish

25.2 - 26.2 mi

Top 23%
×2story building
+22ft-21ft

Overall

6127

Females

1109

F18-39

1109

Passing Analysis

Category:
Athletes Passed
1827
Passed By
1150
Net Change
+677
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8609
5K → 10K92619-527#8609#9136
10K → 15K136169-33#9136#9169
15K → 20K19857+141#9169#9028
20K → Half2818+10#9028#9018
Half → 25K22416+208#9018#8810
25K → 30K33831+307#8810#8503
30K → 20M9668+28#8503#8475
20M → 21M7169+2#8475#8473
21M → 35K6420+44#8473#8429
35K → 23M14226+116#8429#8313
23M → 24M1477+140#8313#8173
24M → 40K9827+71#8173#8102
40K → 25.2M663+63#8102#8039
25.2M → Finish12720+107#8039#7932
TOTALS18271150+677
📊

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