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BOSTON MARATHON 2023

Alice Isom

Bib: 15591•F

CO

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 40%
Gender (Female)
#0 / 11423
Top 21%
Masters (Masters Women)
#0 / 6539
Top 9%
Division (F40-44)
#0 / 1878
Top 19%
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
7:23/mi
22:56
↑ 97↓ 3451.5%
10K· 6.21 mi
7:17/mi
45:33
↑ 79↓ 1380.4%
15K· 9.32 mi
7:32/mi
1:08:58
↑ 67↓ 78
20K· 12.43 mi
7:43/mi
1:32:55
↑ 106↓ 860.1%
Half· 13.11 mi
7:34/mi
1:38:05
↑ 19↓ 370.5%
25K· 15.53 mi
7:48/mi
1:57:00
↑ 66↓ 880.2%
30K· 18.64 mi
8:02/mi
2:21:57
↑ 181↓ 1480.2%
20M
8:15/mi
2:33:10
↑ 64↓ 500.2%
21M
8:48/mi
2:41:58
↑ 106↓ 241.6%
35K· 21.75 mi
7:49/mi
2:47:49
↑ 17↓ 861.7%
23M
8:14/mi
2:58:08
↑ 23↓ 630.6%
24M
8:10/mi
3:06:18
↓ 821.3%
40K· 24.85 mi
8:32/mi
3:13:36
↓ 200.3%
25.2M
8:54/mi
3:16:40
↑ 13↓ 160.2%
Finish· 26.22 mi
7:54/mi
3:24:43
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:05
Pace7:29 /mi
2nd Half
Distance13.11 mi
Time1:46:38
Pace8:08 /mi
📊Positive Split: 8.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:5822:567:2322:56
7:23
-
10K
6.21 mi11:38:3545:337:2022:37
7:17
-0:06
15K
9.32 mi12:02:001:08:587:2423:25
7:32
+0:15
20K
12.43 mi12:25:571:32:557:2923:57
7:43
+0:11
Half
13.11 mi12:31:071:38:057:295:10
7:34
-0:09
25K
15.53 mi12:50:021:57:007:3218:55
7:48
+0:14
30K
18.64 mi13:14:592:21:577:3724:57
8:02
+0:14
20M
20.00 mi13:26:122:33:107:3911:13
8:15
+0:13
21M
21.00 mi13:35:002:41:587:438:48
8:48
+0:33
35K
21.75 mi13:40:512:47:497:435:51
7:49
-0:59
23M
23.00 mi13:51:102:58:087:4510:19
8:14
+0:25
24M
24.00 mi13:59:203:06:187:468:10
8:10
-0:04
40K
24.85 mi14:06:383:13:367:477:18
8:32
+0:22
25.2M
25.20 mi14:09:423:16:407:483:04
8:54
+0:22
Finish
26.22 mi14:17:453:24:437:498:03
7:54
-1:00

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

7:17 /mi

Average Pace

7:49 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:14:08

36% of race

Time at Steady Pace

1:21:43

40% of race

Time at Slower Pace

48:52

24% of race

Average Pace: 7:48 /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 mi11:15:5822:567:2322:56
7:23
#8702
10K
6.21 mi11:38:3545:337:2022:37
7:17
#8663
15K
9.32 mi12:02:001:08:587:2423:25
7:32
#9186
20K
12.43 mi12:25:571:32:557:2923:57
7:43
#9627
Half
13.11 mi12:31:071:38:057:295:10
7:34
#9686
25K
15.53 mi12:50:021:57:007:3218:55
7:48
#9907
30K
18.64 mi13:14:592:21:577:3724:57
8:02
#10094
20M
20.00 mi13:26:122:33:107:3911:13
8:15
#10228
21M
21.00 mi13:35:002:41:587:438:48
8:48
#10330
35K
21.75 mi13:40:512:47:497:435:51
7:49
#10331
23M
23.00 mi13:51:102:58:087:4510:19
8:14
#10358
24M
24.00 mi13:59:203:06:187:468:10
8:10
#10446
40K
24.85 mi14:06:383:13:367:477:18
8:32
#10545
25.2M
25.20 mi14:09:423:16:407:483:04
8:54
#10557
Finish
26.22 mi14:17:453:24:437:498:03
7:54
#10570
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi87021281128110511(Top 39%)2087(Top 18%)2087(Top 111%)
10K6.21 mi3.10 mi8663+391279+21279+28738(Top 33%)1322(Top 12%)1322(Top 70%)
15K9.32 mi3.11 mi9186-5231497-2181497-21810511(Top 39%)2087(Top 18%)2087(Top 111%)
20K12.43 mi3.11 mi9627-4411676-1791676-17911012(Top 41%)2416(Top 21%)2416(Top 129%)
Half13.11 mi0.68 mi9686-591702-261702-2610913(Top 41%)2342(Top 21%)2342(Top 125%)
25K15.53 mi2.42 mi9907-2211815-1131815-11311136(Top 42%)2560(Top 22%)2560(Top 136%)
30K18.64 mi3.11 mi10094-1871936-1211936-12111169(Top 42%)2727(Top 24%)2727(Top 145%)
20M20.00 mi1.36 mi10228-1342035-992035-9912099(Top 45%)3345(Top 29%)3345(Top 178%)
21M21.00 mi1.00 mi10330-1022112-772112-7712312(Top 46%)3584(Top 31%)3584(Top 191%)
35K21.75 mi0.75 mi10331-12128-162128-1610883(Top 41%)2835(Top 25%)2835(Top 151%)
23M23.00 mi1.25 mi10358-272177-492177-4911509(Top 43%)3269(Top 29%)3269(Top 174%)
24M24.00 mi1.00 mi10446-882254-772254-7712440(Top 47%)3836(Top 34%)3836(Top 204%)
40K24.85 mi0.85 mi10545-992333-792333-7913640(Top 51%)4561(Top 40%)4561(Top 243%)
25.2M25.20 mi0.35 mi10557-122349-162349-1612050(Top 45%)3788(Top 33%)3788(Top 202%)
Finish26.22 mi1.02 mi10570-132385-362385-3611449(Top 43%)3437(Top 30%)3437(Top 183%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 39%
×21story building
+97ft-345ft

Overall

10511

Females

2087

F40-44

2087

5K→10K

3.1 - 6.2 mi

Top 33%
×5story building
+79ft-138ft

Overall

8738

Females

1322

F40-44

1322

10K→15K

6.2 - 9.3 mi

Top 39%
×3story building
+67ft-78ft

Overall

10511

Females

2087

F40-44

2087

15K→20K

9.3 - 12.4 mi

Top 41%
×5story building
+106ft-86ft

Overall

11012

Females

2416

F40-44

2416

20K→Half

12.4 - 13.1 mi

Top 41%
×2story building
+19ft-37ft

Overall

10913

Females

2342

F40-44

2342

Half→25K

13.1 - 15.5 mi

Top 42%
×4story building
+66ft-88ft

Overall

11136

Females

2560

F40-44

2560

25K→30K

15.5 - 18.6 mi

Top 42%
×9story building
+181ft-148ft

Overall

11169

Females

2727

F40-44

2727

30K→20M

18.6 - 20.0 mi

Top 45%
×5story building
+64ft-50ft

Overall

12099

Females

3345

F40-44

3345

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

12312

Females

3584

F40-44

3584

21M→35K

21.0 - 21.8 mi

Top 41%
×7story building
+17ft-86ft

Overall

10883

Females

2835

F40-44

2835

35K→23M

21.8 - 23.0 mi

Top 43%
×5story building
+23ft-63ft

Overall

11509

Females

3269

F40-44

3269

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

12440

Females

3836

F40-44

3836

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

13640

Females

4561

F40-44

4561

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12050

Females

3788

F40-44

3788

25.2M→Finish

25.2 - 26.2 mi

Top 43%
×2story building
+22ft-21ft

Overall

11449

Females

3437

F40-44

3437

Passing Analysis

Category:
Athletes Passed
942
Passed By
2809
Net Change
-1868
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8702
5K → 10K273234+39#8702#8663
10K → 15K41564-523#8663#9186
15K → 20K43484-441#9186#9627
20K → Half968-59#9627#9686
Half → 25K68288-221#9686#9907
25K → 30K96283-187#9907#10094
30K → 20M47181-134#10094#10228
20M → 21M58160-102#10228#10330
21M → 35K4950-1#10330#10331
35K → 23M78105-27#10331#10358
23M → 24M36124-88#10358#10446
24M → 40K45144-99#10446#10545
40K → 25.2M2840-12#10545#10557
25.2M → Finish7184-13#10557#10570
TOTALS9422809-1868
📊

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