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BOSTON MARATHON 2023

Callie O'Brien

Bib: 15487•F

IA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 37%
Gender (Female)
#0 / 11423
Top 18%
Division (F18-39)
#0 / 4884
Top 32%
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
7:37/mi
23:39
↑ 97↓ 3451.5%
10K· 6.21 mi
7:45/mi
47:44
↑ 79↓ 1380.4%
15K· 9.32 mi
7:36/mi
1:11:20
↑ 67↓ 78
20K· 12.43 mi
7:39/mi
1:35:07
↑ 106↓ 860.1%
Half· 13.11 mi
7:36/mi
1:40:18
↑ 19↓ 370.5%
25K· 15.53 mi
7:37/mi
1:58:46
↑ 66↓ 880.2%
30K· 18.64 mi
8:02/mi
2:23:45
↑ 181↓ 1480.2%
20M
8:10/mi
2:34:51
↑ 64↓ 500.2%
21M
8:24/mi
2:43:15
↑ 106↓ 241.6%
35K· 21.75 mi
7:52/mi
2:49:08
↑ 17↓ 861.7%
23M
7:51/mi
2:58:58
↑ 23↓ 630.6%
24M
7:29/mi
3:06:27
↓ 821.3%
40K· 24.85 mi
7:34/mi
3:12:55
↓ 200.3%
25.2M
7:38/mi
3:15:33
↑ 13↓ 160.2%
Finish· 26.22 mi
6:52/mi
3:22:33
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:18
Pace7:39 /mi
2nd Half
Distance13.11 mi
Time1:42:15
Pace7:48 /mi
📊Positive Split: 1.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:0723:397:3723:39
7:37
-
10K
6.21 mi11:18:1247:447:4124:05
7:45
+0:08
15K
9.32 mi11:41:481:11:207:3923:36
7:36
-0:09
20K
12.43 mi12:05:351:35:077:3923:47
7:39
+0:03
Half
13.11 mi12:10:461:40:187:395:11
7:36
-0:03
25K
15.53 mi12:29:141:58:467:3918:28
7:37
+0:01
30K
18.64 mi12:54:132:23:457:4324:59
8:02
+0:25
20M
20.00 mi13:05:192:34:517:4511:06
8:10
+0:08
21M
21.00 mi13:13:432:43:157:468:24
8:24
+0:14
35K
21.75 mi13:19:362:49:087:475:53
7:52
-0:32
23M
23.00 mi13:29:262:58:587:479:50
7:51
-0:01
24M
24.00 mi13:36:553:06:277:467:29
7:29
-0:22
40K
24.85 mi13:43:233:12:557:466:28
7:34
+0:05
25.2M
25.20 mi13:46:013:15:337:462:38
7:38
+0:04
Finish
26.22 mi13:53:013:22:337:447:00
6:52
-0:46

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

6:52 /mi

Average Pace

7:44 /mi

Slowest Pace

8:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

7:00

3% of race

Time at Steady Pace

2:15:21

67% of race

Time at Slower Pace

1:00:12

30% of race

Average Pace: 7:44 /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 mi10:54:0723:397:3723:39
7:37
#10658
10K
6.21 mi11:18:1247:447:4124:05
7:45
#11638
15K
9.32 mi11:41:481:11:207:3923:36
7:36
#11386
20K
12.43 mi12:05:351:35:077:3923:47
7:39
#11143
Half
13.11 mi12:10:461:40:187:395:11
7:36
#11133
25K
15.53 mi12:29:141:58:467:3918:28
7:37
#10868
30K
18.64 mi12:54:132:23:457:4324:59
8:02
#10866
20M
20.00 mi13:05:192:34:517:4511:06
8:10
#10869
21M
21.00 mi13:13:432:43:157:468:24
8:24
#10803
35K
21.75 mi13:19:362:49:087:475:53
7:52
#10789
23M
23.00 mi13:29:262:58:587:479:50
7:51
#10644
24M
24.00 mi13:36:553:06:277:467:29
7:29
#10494
40K
24.85 mi13:43:233:12:557:466:28
7:34
#10334
25.2M
25.20 mi13:46:013:15:337:462:38
7:38
#10198
Finish
26.22 mi13:53:013:22:337:447:00
6:52
#9902
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi106582164216410992(Top 41%)2336(Top 20%)2336(Top 48%)
10K6.21 mi3.10 mi11638-9802669-5052669-50512698(Top 48%)3251(Top 28%)3251(Top 67%)
15K9.32 mi3.11 mi11386+2522539+1302539+13010992(Top 41%)2336(Top 20%)2336(Top 48%)
20K12.43 mi3.11 mi11143+2432403+1362403+13610568(Top 40%)2179(Top 19%)2179(Top 45%)
Half13.11 mi0.68 mi11133+102402+12402+111032(Top 41%)2374(Top 21%)2374(Top 49%)
25K15.53 mi2.42 mi10868+2652281+1212281+1219685(Top 36%)1864(Top 16%)1864(Top 38%)
30K18.64 mi3.11 mi10866+22331-502331-5011232(Top 42%)2750(Top 24%)2750(Top 56%)
20M20.00 mi1.36 mi10869-32364-332364-3311467(Top 43%)2973(Top 26%)2973(Top 61%)
21M21.00 mi1.00 mi10803+662357+72357+79874(Top 37%)2320(Top 20%)2320(Top 48%)
35K21.75 mi0.75 mi10789+142366-92366-911143(Top 42%)2930(Top 26%)2930(Top 60%)
23M23.00 mi1.25 mi10644+1452326+402326+408776(Top 33%)1923(Top 17%)1923(Top 39%)
24M24.00 mi1.00 mi10494+1502276+502276+507630(Top 29%)1535(Top 13%)1535(Top 31%)
40K24.85 mi0.85 mi10334+1602218+582218+587148(Top 27%)1435(Top 13%)1435(Top 29%)
25.2M25.20 mi0.35 mi10198+1362158+602158+604664(Top 18%)636(Top 6%)636(Top 13%)
Finish26.22 mi1.02 mi9902+2962050+1082050+1084494(Top 17%)587(Top 5%)587(Top 12%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

10992

Females

2336

F18-39

2336

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

12698

Females

3251

F18-39

3251

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

10992

Females

2336

F18-39

2336

15K→20K

9.3 - 12.4 mi

Top 40%
×5story building
+106ft-86ft

Overall

10568

Females

2179

F18-39

2179

20K→Half

12.4 - 13.1 mi

Top 41%
×2story building
+19ft-37ft

Overall

11032

Females

2374

F18-39

2374

Half→25K

13.1 - 15.5 mi

Top 36%
×4story building
+66ft-88ft

Overall

9685

Females

1864

F18-39

1864

25K→30K

15.5 - 18.6 mi

Top 42%
×9story building
+181ft-148ft

Overall

11232

Females

2750

F18-39

2750

30K→20M

18.6 - 20.0 mi

Top 43%
×5story building
+64ft-50ft

Overall

11467

Females

2973

F18-39

2973

20M→21M

20.0 - 21.0 mi

Top 37%
×8story building
+106ft-24ft

Overall

9874

Females

2320

F18-39

2320

21M→35K

21.0 - 21.8 mi

Top 42%
×7story building
+17ft-86ft

Overall

11143

Females

2930

F18-39

2930

35K→23M

21.8 - 23.0 mi

Top 33%
×5story building
+23ft-63ft

Overall

8776

Females

1923

F18-39

1923

23M→24M

23.0 - 24.0 mi

Top 29%
×6story building
+12ft-82ft

Overall

7630

Females

1535

F18-39

1535

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7148

Females

1435

F18-39

1435

40K→25.2M

24.9 - 25.2 mi

Top 18%
×1story
+13ft-16ft

Overall

4664

Females

636

F18-39

636

25.2M→Finish

25.2 - 26.2 mi

Top 17%
×2story building
+22ft-21ft

Overall

4494

Females

587

F18-39

587

Passing Analysis

Category:
Athletes Passed
2376*
Passed By
1620
Net Change
+756
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10658
5K → 10K631043-980#10658#11638
10K → 15K33987+252#11638#11386
15K → 20K29350+243#11386#11143
20K → Half2818+10#11143#11133
Half → 25K27813+265#11133#10868
25K → 30K199197+2#10868#10866
30K → 20M81*84-3#10866#10869
20M → 21M10741+66#10869#10803
21M → 35K5440+14#10803#10789
35K → 23M16621+145#10789#10644
23M → 24M16212+150#10644#10494
24M → 40K17111+160#10494#10334
40K → 25.2M137*1+136#10334#10198
25.2M → Finish298*2+296#10198#9902
TOTALS2376*1620+756

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

📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing