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BOSTON MARATHON 2023

Merit Alfaro

Bib: 21274•F

IN

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

Start
0:00:00
Race begins
5K· 3.11 mi
27:44
Rank: #20113
Start → 5K
27:44 | 8:56/mi
10K· 6.21 mi
55:16
Rank: #20174 (-61)
5K → 10K
27:32 | 8:52/mi
15K· 9.32 mi
1:22:57
Rank: #20125 (+49)
10K → 15K
27:41 | 8:55/mi
20K· 12.43 mi
1:51:04
Rank: #20053 (+72)
15K → 20K
28:07 | 9:03/mi
Half· 13.11 mi
1:57:07
Rank: #20050 (+3)
20K → Half
6:03 | 8:52/mi
25K· 15.53 mi
2:19:12
Rank: #19940 (+110)
Half → 25K
22:05 | 9:06/mi
30K· 18.64 mi
2:49:06
Rank: #19927 (+13)
25K → 30K
29:54 | 9:37/mi
20M
3:02:29
Rank: #19933 (-6)
30K → 20M
13:23 | 9:51/mi
21M
3:32:05
Rank: #22661 (-2728)
20M → 21M
29:36 | 29:36/mi
35K· 21.75 mi
3:39:30
Rank: #22593 (+68)
21M → 35K
7:25 | 9:55/mi
23M
3:51:49
Rank: #22438 (+155)
35K → 23M
12:19 | 9:50/mi
24M
4:01:08
Rank: #22307 (+131)
23M → 24M
9:19 | 9:19/mi
40K· 24.85 mi
4:11:45
Rank: #22422 (-115)
24M → 40K
10:37 | 12:25/mi
25.2M
4:16:17
Rank: #22447 (-25)
40K → 25.2M
4:32 | 13:09/mi
Finish· 26.22 mi
4:27:17
Rank: #22497 (-50)
25.2M → Finish
11:00 | 10:48/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:07
Pace8:56 /mi
2nd Half
Distance13.11 mi
Time2:30:10
Pace11:27 /mi
📊Positive Split: 28.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:0727:448:5627:44
8:56
-
10K
6.21 mi11:48:3955:168:5427:32
8:52
-0:04
15K
9.32 mi12:16:201:22:578:5427:41
8:55
+0:03
20K
12.43 mi12:44:271:51:048:5628:07
9:03
+0:08
Half
13.11 mi12:50:301:57:078:566:03
8:52
-0:11
25K
15.53 mi13:12:352:19:128:5822:05
9:06
+0:14
30K
18.64 mi13:42:292:49:069:0429:54
9:37
+0:31
20M
20.00 mi13:55:523:02:299:0713:23
9:51
+0:14
21M
21.00 mi14:25:283:32:0510:0629:36
29:36
+19:45
35K
21.75 mi14:32:533:39:3010:067:25
9:55
-19:41
23M
23.00 mi14:45:123:51:4910:0512:19
9:50
-0:05
24M
24.00 mi14:54:314:01:0810:039:19
9:19
-0:31
40K
24.85 mi15:05:084:11:4510:0810:37
12:25
+3:06
25.2M
25.20 mi15:09:404:16:1710:104:32
13:09
+0:44
Finish
26.22 mi15:20:404:27:1710:1211:00
10:48
-2:21

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

8:52 /mi

Average Pace

10:12 /mi

Slowest Pace

29:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:42:32

83% of race

Time at Slower Pace

44:45

17% of race

Average Pace: 10:12 /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 mi11:21:0727:448:5627:44
8:56
#20113
10K
6.21 mi11:48:3955:168:5427:32
8:52
#20174
15K
9.32 mi12:16:201:22:578:5427:41
8:55
#20125
20K
12.43 mi12:44:271:51:048:5628:07
9:03
#20053
Half
13.11 mi12:50:301:57:078:566:03
8:52
#20050
25K
15.53 mi13:12:352:19:128:5822:05
9:06
#19940
30K
18.64 mi13:42:292:49:069:0429:54
9:37
#19927
20M
20.00 mi13:55:523:02:299:0713:23
9:51
#19933
21M
21.00 mi14:25:283:32:0510:0629:36
29:36
#22661
35K
21.75 mi14:32:533:39:3010:067:25
9:55
#22593
23M
23.00 mi14:45:123:51:4910:0512:19
9:50
#22438
24M
24.00 mi14:54:314:01:0810:039:19
9:19
#22307
40K
24.85 mi15:05:084:11:4510:0810:37
12:25
#22422
25.2M
25.20 mi15:09:404:16:1710:104:32
13:09
#22447
Finish
26.22 mi15:20:404:27:1710:1211:00
10:48
#22497
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi201137887788720094(Top 75%)7730(Top 68%)7730(Top 425%)
10K6.21 mi3.10 mi20174-617862+257862+2520245(Top 76%)7843(Top 69%)7843(Top 432%)
15K9.32 mi3.11 mi20125+497809+537809+5320094(Top 75%)7730(Top 68%)7730(Top 425%)
20K12.43 mi3.11 mi20053+727750+597750+5919941(Top 75%)7645(Top 67%)7645(Top 421%)
Half13.11 mi0.68 mi20050+37749+17749+119897(Top 75%)7622(Top 67%)7622(Top 419%)
25K15.53 mi2.42 mi19940+1107681+687681+6819467(Top 73%)7411(Top 65%)7411(Top 408%)
30K18.64 mi3.11 mi19927+137690-97690-919889(Top 75%)7705(Top 67%)7705(Top 424%)
20M20.00 mi1.36 mi19933-67703-137703-1320033(Top 75%)7879(Top 69%)7879(Top 434%)
21M21.00 mi1.00 mi22661-27289232-15299232-152926622(Top 100%)11423(Top 100%)11423(Top 629%)
35K21.75 mi0.75 mi22593+689201+319201+3121074(Top 79%)8536(Top 75%)8536(Top 470%)
23M23.00 mi1.25 mi22438+1559118+839118+8319551(Top 73%)7715(Top 68%)7715(Top 425%)
24M24.00 mi1.00 mi22307+1319050+689050+6818566(Top 70%)7217(Top 63%)7217(Top 397%)
40K24.85 mi0.85 mi22422-1159128-789128-7824350(Top 91%)10365(Top 91%)10365(Top 570%)
25.2M25.20 mi0.35 mi22447-259145-179145-1724147(Top 91%)10252(Top 90%)10252(Top 564%)
Finish26.22 mi1.02 mi22497-509183-389183-3823603(Top 89%)9957(Top 87%)9957(Top 548%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21stories
+97ft-345ft

Overall

20094

Females

7730

F45-49

7730

5K→10K

3.1 - 6.2 mi

Top 76%
×5stories
+79ft-138ft

Overall

20245

Females

7843

F45-49

7843

10K→15K

6.2 - 9.3 mi

Top 75%
×3stories
+67ft-78ft

Overall

20094

Females

7730

F45-49

7730

15K→20K

9.3 - 12.4 mi

Top 75%
×5stories
+106ft-86ft

Overall

19941

Females

7645

F45-49

7645

20K→Half

12.4 - 13.1 mi

Top 75%
×2stories
+19ft-37ft

Overall

19897

Females

7622

F45-49

7622

Half→25K

13.1 - 15.5 mi

Top 73%
×4stories
+66ft-88ft

Overall

19467

Females

7411

F45-49

7411

25K→30K

15.5 - 18.6 mi

Top 75%
×9stories
+181ft-148ft

Overall

19889

Females

7705

F45-49

7705

30K→20M

18.6 - 20.0 mi

Top 75%
×5stories
+64ft-50ft

Overall

20033

Females

7879

F45-49

7879

20M→21M

20.0 - 21.0 mi

Top 100%
×8stories
+106ft-24ft

Overall

26622

Females

11423

F45-49

11423

21M→35K

21.0 - 21.8 mi

Top 79%
×7stories
+17ft-86ft

Overall

21074

Females

8536

F45-49

8536

35K→23M

21.8 - 23.0 mi

Top 73%
×5stories
+23ft-63ft

Overall

19551

Females

7715

F45-49

7715

23M→24M

23.0 - 24.0 mi

Top 70%
×6stories
+12ft-82ft

Overall

18566

Females

7217

F45-49

7217

24M→40K

24.0 - 24.9 mi

Top 91%
×1story
+6ft-20ft

Overall

24350

Females

10365

F45-49

10365

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

24147

Females

10252

F45-49

10252

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2stories
+22ft-21ft

Overall

23603

Females

9957

F45-49

9957

Passing Analysis

Category:
Athletes Passed
1541
Passed By
3925
Net Change
-2384
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20113
5K → 10K272333-61#20113#20174
10K → 15K205156+49#20174#20125
15K → 20K195123+72#20125#20053
20K → Half3330+3#20053#20050
Half → 25K17464+110#20050#19940
25K → 30K164151+13#19940#19927
30K → 20M8086-6#19927#19933
20M → 21M02728-2728#19933#22661
21M → 35K8012+68#22661#22593
35K → 23M1572+155#22593#22438
23M → 24M1354+131#22438#22307
24M → 40K11126-115#22307#22422
40K → 25.2M732-25#22422#22447
25.2M → Finish2878-50#22447#22497
TOTALS15413925-2384
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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