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BOSTON MARATHON 2023

Allison Kalmakoff

Bib: 20888•F

AB

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
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
9:21/mi
29:02
↑ 97↓ 3451.5%
10K· 6.21 mi
9:56/mi
59:55
↑ 79↓ 1380.4%
15K· 9.32 mi
9:28/mi
1:29:19
↑ 67↓ 78
20K· 12.43 mi
10:51/mi
2:03:03
↑ 106↓ 860.1%
Half· 13.11 mi
10:10/mi
2:09:59
↑ 19↓ 370.5%
25K· 15.53 mi
10:36/mi
2:35:41
↑ 66↓ 880.2%
30K· 18.64 mi
11:38/mi
3:11:50
↑ 181↓ 1480.2%
20M
11:22/mi
3:27:17
↑ 64↓ 500.2%
21M
11:52/mi
3:39:09
↑ 106↓ 241.6%
35K· 21.75 mi
11:39/mi
3:47:52
↑ 17↓ 861.7%
23M
11:25/mi
4:02:10
↑ 23↓ 630.6%
24M
11:03/mi
4:13:13
↓ 821.3%
40K· 24.85 mi
10:56/mi
4:22:34
↓ 200.3%
25.2M
12:43/mi
4:26:57
↑ 13↓ 160.2%
Finish· 26.22 mi
10:04/mi
4:37:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:09:59
Pace9:55 /mi
2nd Half
Distance13.11 mi
Time2:27:13
Pace11:14 /mi
📊Positive Split: 13.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:4429:029:2129:02
9:21
-
10K
6.21 mi11:56:3759:559:3930:53
9:56
+0:35
15K
9.32 mi12:26:011:29:199:3529:24
9:28
-0:28
20K
12.43 mi12:59:452:03:039:5433:44
10:51
+1:23
Half
13.11 mi13:06:412:09:599:556:56
10:10
-0:41
25K
15.53 mi13:32:232:35:4110:0125:42
10:36
+0:26
30K
18.64 mi14:08:323:11:5010:1736:09
11:38
+1:02
20M
20.00 mi14:23:593:27:1710:2215:27
11:22
-0:16
21M
21.00 mi14:35:513:39:0910:2611:52
11:52
+0:30
35K
21.75 mi14:44:343:47:5210:298:43
11:39
-0:13
23M
23.00 mi14:58:524:02:1010:3214:18
11:25
-0:14
24M
24.00 mi15:09:554:13:1310:3311:03
11:03
-0:22
40K
24.85 mi15:19:164:22:3410:349:21
10:56
-0:07
25.2M
25.20 mi15:23:394:26:5710:364:23
12:43
+1:47
Finish
26.22 mi15:33:544:37:1210:3510:15
10:04
-2:39

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

9:21 /mi

Average Pace

10:35 /mi

Slowest Pace

12:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:30

38% of race

Time at Steady Pace

1:35:17

34% of race

Time at Slower Pace

1:15:25

27% of race

Average Pace: 10:34 /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 mi11:25:4429:029:2129:02
9:21
#21672
10K
6.21 mi11:56:3759:559:3930:53
9:56
#22740
15K
9.32 mi12:26:011:29:199:3529:24
9:28
#22540
20K
12.43 mi12:59:452:03:039:5433:44
10:51
#23198
Half
13.11 mi13:06:412:09:599:556:56
10:10
#23225
25K
15.53 mi13:32:232:35:4110:0125:42
10:36
#23253
30K
18.64 mi14:08:323:11:5010:1736:09
11:38
#23422
20M
20.00 mi14:23:593:27:1710:2215:27
11:22
#23416
21M
21.00 mi14:35:513:39:0910:2611:52
11:52
#23371
35K
21.75 mi14:44:343:47:5210:298:43
11:39
#23421
23M
23.00 mi14:58:524:02:1010:3214:18
11:25
#23408
24M
24.00 mi15:09:554:13:1310:3311:03
11:03
#23399
40K
24.85 mi15:19:164:22:3410:349:21
10:56
#23347
25.2M
25.20 mi15:23:394:26:5710:364:23
12:43
#23357
Finish
26.22 mi15:33:544:37:1210:3510:15
10:04
#23313
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi216728731873122153(Top 83%)8879(Top 78%)8879(Top 489%)
10K6.21 mi3.10 mi22740-10689221-4909221-49023590(Top 89%)9674(Top 85%)9674(Top 532%)
15K9.32 mi3.11 mi22540+2009113+1089113+10822153(Top 83%)8879(Top 78%)8879(Top 489%)
20K12.43 mi3.11 mi23198-6589456-3439456-34324406(Top 92%)10153(Top 89%)10153(Top 559%)
Half13.11 mi0.68 mi23225-279470-149470-1423616(Top 89%)9690(Top 85%)9690(Top 533%)
25K15.53 mi2.42 mi23253-289482-129482-1223358(Top 88%)9590(Top 84%)9590(Top 528%)
30K18.64 mi3.11 mi23422-1699600-1189600-11824041(Top 90%)10033(Top 88%)10033(Top 552%)
20M20.00 mi1.36 mi23416+69615-159615-1523311(Top 88%)9686(Top 85%)9686(Top 533%)
21M21.00 mi1.00 mi23371+459597+189597+1822533(Top 85%)9300(Top 81%)9300(Top 512%)
35K21.75 mi0.75 mi23421-509629-329629-3224288(Top 91%)10277(Top 90%)10277(Top 566%)
23M23.00 mi1.25 mi23408+139634-59634-523119(Top 87%)9652(Top 84%)9652(Top 531%)
24M24.00 mi1.00 mi23399+99639-59639-523146(Top 87%)9713(Top 85%)9713(Top 535%)
40K24.85 mi0.85 mi23347+529622+179622+1722234(Top 84%)9260(Top 81%)9260(Top 510%)
25.2M25.20 mi0.35 mi23357-109634-129634-1223608(Top 89%)9983(Top 87%)9983(Top 549%)
Finish26.22 mi1.02 mi23313+449616+189616+1821941(Top 82%)9092(Top 80%)9092(Top 500%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 83%
×21story building
+97ft-345ft

Overall

22153

Females

8879

F45-49

8879

5K→10K

3.1 - 6.2 mi

Top 89%
×5story building
+79ft-138ft

Overall

23590

Females

9674

F45-49

9674

10K→15K

6.2 - 9.3 mi

Top 83%
×3story building
+67ft-78ft

Overall

22153

Females

8879

F45-49

8879

15K→20K

9.3 - 12.4 mi

Top 92%
×5story building
+106ft-86ft

Overall

24406

Females

10153

F45-49

10153

20K→Half

12.4 - 13.1 mi

Top 89%
×2story building
+19ft-37ft

Overall

23616

Females

9690

F45-49

9690

Half→25K

13.1 - 15.5 mi

Top 88%
×4story building
+66ft-88ft

Overall

23358

Females

9590

F45-49

9590

25K→30K

15.5 - 18.6 mi

Top 90%
×9story building
+181ft-148ft

Overall

24041

Females

10033

F45-49

10033

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

23311

Females

9686

F45-49

9686

20M→21M

20.0 - 21.0 mi

Top 85%
×8story building
+106ft-24ft

Overall

22533

Females

9300

F45-49

9300

21M→35K

21.0 - 21.8 mi

Top 91%
×7story building
+17ft-86ft

Overall

24288

Females

10277

F45-49

10277

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

23119

Females

9652

F45-49

9652

23M→24M

23.0 - 24.0 mi

Top 87%
×6story building
+12ft-82ft

Overall

23146

Females

9713

F45-49

9713

24M→40K

24.0 - 24.9 mi

Top 84%
×1story
+6ft-20ft

Overall

22234

Females

9260

F45-49

9260

40K→25.2M

24.9 - 25.2 mi

Top 89%
×1story
+13ft-16ft

Overall

23608

Females

9983

F45-49

9983

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2story building
+22ft-21ft

Overall

21941

Females

9092

F45-49

9092

Passing Analysis

Category:
Athletes Passed
834
Passed By
2475
Net Change
-1641
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21672
5K → 10K201088-1068#21672#22740
10K → 15K26262+200#22740#22540
15K → 20K17675-658#22540#23198
20K → Half2249-27#23198#23225
Half → 25K85113-28#23225#23253
25K → 30K67236-169#23253#23422
30K → 20M5549+6#23422#23416
20M → 21M6823+45#23416#23371
21M → 35K1262-50#23371#23421
35K → 23M5340+13#23421#23408
23M → 24M4132+9#23408#23399
24M → 40K597+52#23399#23347
40K → 25.2M1727-10#23347#23357
25.2M → Finish5612+44#23357#23313
TOTALS8342475-1641
📊

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