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BOSTON MARATHON 2023

Alexandra Bolhack

Bib: 31950•F

NY

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
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
11:02/mi
34:17
↑ 97↓ 3451.5%
10K· 6.21 mi
10:23/mi
1:06:32
↑ 79↓ 1380.4%
15K· 9.32 mi
10:07/mi
1:37:57
↑ 67↓ 78
20K· 12.43 mi
10:56/mi
2:11:56
↑ 106↓ 860.1%
Half· 13.11 mi
10:35/mi
2:19:09
↑ 19↓ 370.5%
25K· 15.53 mi
11:55/mi
2:48:03
↑ 66↓ 880.2%
30K· 18.64 mi
11:19/mi
3:23:13
↑ 181↓ 1480.2%
20M
11:15/mi
3:38:30
↑ 64↓ 500.2%
21M
12:52/mi
3:51:22
↑ 106↓ 241.6%
35K· 21.75 mi
10:55/mi
3:59:32
↑ 17↓ 861.7%
23M
11:38/mi
4:14:06
↑ 23↓ 630.6%
24M
11:11/mi
4:25:17
↓ 821.3%
40K· 24.85 mi
12:09/mi
4:35:40
↓ 200.3%
25.2M
12:46/mi
4:40:04
↑ 13↓ 160.2%
Finish· 26.22 mi
10:12/mi
4:50:28
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:19:09
Pace10:37 /mi
2nd Half
Distance13.11 mi
Time2:31:19
Pace11:33 /mi
📊Positive Split: 8.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:55:4334:1711:0234:17
11:02
-
10K
6.21 mi12:27:581:06:3210:4232:15
10:23
-0:39
15K
9.32 mi12:59:231:37:5710:3131:25
10:07
-0:16
20K
12.43 mi13:33:222:11:5610:3733:59
10:56
+0:49
Half
13.11 mi13:40:352:19:0910:377:13
10:35
-0:21
25K
15.53 mi14:09:292:48:0310:4928:54
11:55
+1:20
30K
18.64 mi14:44:393:23:1310:5435:10
11:19
-0:36
20M
20.00 mi14:59:563:38:3010:5515:17
11:15
-0:04
21M
21.00 mi15:12:483:51:2211:0112:52
12:52
+1:37
35K
21.75 mi15:20:583:59:3211:018:10
10:55
-1:57
23M
23.00 mi15:35:324:14:0611:0314:34
11:38
+0:43
24M
24.00 mi15:46:434:25:1711:0311:11
11:11
-0:27
40K
24.85 mi15:57:064:35:4011:0510:23
12:09
+0:58
25.2M
25.20 mi16:01:304:40:0411:074:24
12:46
+0:37
Finish
26.22 mi16:11:544:50:2811:0510:24
10:12
-2:34

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

10:07 /mi

Average Pace

11:05 /mi

Slowest Pace

12:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:21:17

28% of race

Time at Steady Pace

2:18:04

48% of race

Time at Slower Pace

1:11:07

24% of race

Average Pace: 11:05 /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 mi11:55:4334:1711:0234:17
11:02
#25732
10K
6.21 mi12:27:581:06:3210:4232:15
10:23
#25102
15K
9.32 mi12:59:231:37:5710:3131:25
10:07
#24649
20K
12.43 mi13:33:222:11:5610:3733:59
10:56
#24630
Half
13.11 mi13:40:352:19:0910:377:13
10:35
#24614
25K
15.53 mi14:09:292:48:0310:4928:54
11:55
#24728
30K
18.64 mi14:44:393:23:1310:5435:10
11:19
#24534
20M
20.00 mi14:59:563:38:3010:5515:17
11:15
#24414
21M
21.00 mi15:12:483:51:2211:0112:52
12:52
#24394
35K
21.75 mi15:20:583:59:3211:018:10
10:55
#24338
23M
23.00 mi15:35:324:14:0611:0314:34
11:38
#24302
24M
24.00 mi15:46:434:25:1711:0311:11
11:11
#24267
40K
24.85 mi15:57:064:35:4011:0510:23
12:09
#24275
25.2M
25.20 mi16:01:304:40:0411:074:24
12:46
#24259
Finish
26.22 mi16:11:544:50:2811:0510:24
10:12
#24216
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi25732108761087623723(Top 89%)9739(Top 85%)9739(Top 199%)
10K6.21 mi3.10 mi25102+63010493+38310493+38324457(Top 92%)10144(Top 89%)10144(Top 208%)
15K9.32 mi3.11 mi24649+45310252+24110252+24123723(Top 89%)9739(Top 85%)9739(Top 199%)
20K12.43 mi3.11 mi24630+1910253-110253-124538(Top 92%)10222(Top 89%)10222(Top 209%)
Half13.11 mi0.68 mi24614+1610242+1110242+1124351(Top 91%)10128(Top 89%)10128(Top 207%)
25K15.53 mi2.42 mi24728-11410314-7210314-7225087(Top 94%)10563(Top 92%)10563(Top 216%)
30K18.64 mi3.11 mi24534+19410226+8810226+8823609(Top 89%)9782(Top 86%)9782(Top 200%)
20M20.00 mi1.36 mi24414+12010164+6210164+6223105(Top 87%)9572(Top 84%)9572(Top 196%)
21M21.00 mi1.00 mi24394+2010163+110163+123938(Top 90%)10054(Top 88%)10054(Top 206%)
35K21.75 mi0.75 mi24338+5610143+2010143+2023167(Top 87%)9681(Top 85%)9681(Top 198%)
23M23.00 mi1.25 mi24302+3610129+1410129+1423481(Top 88%)9845(Top 86%)9845(Top 202%)
24M24.00 mi1.00 mi24267+3510119+1010119+1023387(Top 88%)9842(Top 86%)9842(Top 202%)
40K24.85 mi0.85 mi24275-810123-410123-424068(Top 90%)10210(Top 89%)10210(Top 209%)
25.2M25.20 mi0.35 mi24259+1610116+710116+723680(Top 89%)10026(Top 88%)10026(Top 205%)
Finish26.22 mi1.02 mi24216+4310102+1410102+1422331(Top 84%)9296(Top 81%)9296(Top 190%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 89%
×21story building
+97ft-345ft

Overall

23723

Females

9739

F18-39

9739

5K→10K

3.1 - 6.2 mi

Top 92%
×5story building
+79ft-138ft

Overall

24457

Females

10144

F18-39

10144

10K→15K

6.2 - 9.3 mi

Top 89%
×3story building
+67ft-78ft

Overall

23723

Females

9739

F18-39

9739

15K→20K

9.3 - 12.4 mi

Top 92%
×5story building
+106ft-86ft

Overall

24538

Females

10222

F18-39

10222

20K→Half

12.4 - 13.1 mi

Top 91%
×2story building
+19ft-37ft

Overall

24351

Females

10128

F18-39

10128

Half→25K

13.1 - 15.5 mi

Top 94%
×4story building
+66ft-88ft

Overall

25087

Females

10563

F18-39

10563

25K→30K

15.5 - 18.6 mi

Top 89%
×9story building
+181ft-148ft

Overall

23609

Females

9782

F18-39

9782

30K→20M

18.6 - 20.0 mi

Top 87%
×5story building
+64ft-50ft

Overall

23105

Females

9572

F18-39

9572

20M→21M

20.0 - 21.0 mi

Top 90%
×8story building
+106ft-24ft

Overall

23938

Females

10054

F18-39

10054

21M→35K

21.0 - 21.8 mi

Top 87%
×7story building
+17ft-86ft

Overall

23167

Females

9681

F18-39

9681

35K→23M

21.8 - 23.0 mi

Top 88%
×5story building
+23ft-63ft

Overall

23481

Females

9845

F18-39

9845

23M→24M

23.0 - 24.0 mi

Top 88%
×6story building
+12ft-82ft

Overall

23387

Females

9842

F18-39

9842

24M→40K

24.0 - 24.9 mi

Top 90%
×1story
+6ft-20ft

Overall

24068

Females

10210

F18-39

10210

40K→25.2M

24.9 - 25.2 mi

Top 89%
×1story
+13ft-16ft

Overall

23680

Females

10026

F18-39

10026

25.2M→Finish

25.2 - 26.2 mi

Top 84%
×2story building
+22ft-21ft

Overall

22331

Females

9296

F18-39

9296

Passing Analysis

Category:
Athletes Passed
1916
Passed By
400
Net Change
+1516
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25732
5K → 10K6377+630#25732#25102
10K → 15K4596+453#25102#24649
15K → 20K10788+19#24649#24630
20K → Half2913+16#24630#24614
Half → 25K41155-114#24614#24728
25K → 30K21016+194#24728#24534
30K → 20M1244+120#24534#24414
20M → 21M5131+20#24414#24394
21M → 35K593+56#24394#24338
35K → 23M5216+36#24338#24302
23M → 24M5217+35#24302#24267
24M → 40K2432-8#24267#24275
40K → 25.2M193+16#24275#24259
25.2M → Finish529+43#24259#24216
TOTALS1916400+1516
📊

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