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BOSTON MARATHON 2023

Sofia Fonseca Bolaños

Bib: 18136•F

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 42%
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
8:32/mi
26:30
↑ 97↓ 3451.5%
10K· 6.21 mi
8:02/mi
51:27
↑ 79↓ 1380.4%
15K· 9.32 mi
8:09/mi
1:16:46
↑ 67↓ 78
20K· 12.43 mi
8:23/mi
1:42:48
↑ 106↓ 860.1%
Half· 13.11 mi
8:10/mi
1:48:22
↑ 19↓ 370.5%
25K· 15.53 mi
8:18/mi
2:08:30
↑ 66↓ 880.2%
30K· 18.64 mi
8:41/mi
2:35:28
↑ 181↓ 1480.2%
20M
8:54/mi
2:47:33
↑ 64↓ 500.2%
21M
9:21/mi
2:56:54
↑ 106↓ 241.6%
35K· 21.75 mi
8:32/mi
3:03:17
↑ 17↓ 861.7%
23M
8:28/mi
3:13:53
↑ 23↓ 630.6%
24M
7:47/mi
3:21:40
↓ 821.3%
40K· 24.85 mi
7:58/mi
3:28:29
↓ 200.3%
25.2M
8:48/mi
3:31:31
↑ 13↓ 160.2%
Finish· 26.22 mi
7:41/mi
3:39:21
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:22
Pace8:16 /mi
2nd Half
Distance13.11 mi
Time1:50:59
Pace8:28 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:4126:308:3226:30
8:32
-
10K
6.21 mi11:46:3851:278:1724:57
8:02
-0:30
15K
9.32 mi12:11:571:16:468:1425:19
8:09
+0:07
20K
12.43 mi12:37:591:42:488:1626:02
8:23
+0:14
Half
13.11 mi12:43:331:48:228:165:34
8:10
-0:13
25K
15.53 mi13:03:412:08:308:1620:08
8:18
+0:08
30K
18.64 mi13:30:392:35:288:2026:58
8:41
+0:23
20M
20.00 mi13:42:442:47:338:2312:05
8:54
+0:13
21M
21.00 mi13:52:052:56:548:259:21
9:21
+0:27
35K
21.75 mi13:58:283:03:178:266:23
8:32
-0:49
23M
23.00 mi14:09:043:13:538:2610:36
8:28
-0:04
24M
24.00 mi14:16:513:21:408:247:47
7:47
-0:41
40K
24.85 mi14:23:403:28:298:236:49
7:58
+0:11
25.2M
25.20 mi14:26:423:31:318:243:02
8:48
+0:50
Finish
26.22 mi14:34:323:39:218:227:50
7:41
-1:07

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

7:41 /mi

Average Pace

8:22 /mi

Slowest Pace

9:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:18:16

36% of race

Time at Steady Pace

1:29:39

41% of race

Time at Slower Pace

51:26

23% of race

Average Pace: 8:22 /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 mi11:21:4126:308:3226:30
8:32
#17758
10K
6.21 mi11:46:3851:278:1724:57
8:02
#16364
15K
9.32 mi12:11:571:16:468:1425:19
8:09
#16093
20K
12.43 mi12:37:591:42:488:1626:02
8:23
#16070
Half
13.11 mi12:43:331:48:228:165:34
8:10
#16035
25K
15.53 mi13:03:412:08:308:1620:08
8:18
#15837
30K
18.64 mi13:30:392:35:288:2026:58
8:41
#15750
20M
20.00 mi13:42:442:47:338:2312:05
8:54
#15725
21M
21.00 mi13:52:052:56:548:259:21
9:21
#15689
35K
21.75 mi13:58:283:03:178:266:23
8:32
#15668
23M
23.00 mi14:09:043:13:538:2610:36
8:28
#15496
24M
24.00 mi14:16:513:21:408:247:47
7:47
#15228
40K
24.85 mi14:23:403:28:298:236:49
7:58
#15028
25.2M
25.20 mi14:26:423:31:318:243:02
8:48
#14963
Finish
26.22 mi14:34:323:39:218:227:50
7:41
#14769
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi177586399639915500(Top 58%)4981(Top 44%)4981(Top 102%)
10K6.21 mi3.10 mi16364+13945502+8975502+89715029(Top 56%)4698(Top 41%)4698(Top 96%)
15K9.32 mi3.11 mi16093+2715342+1605342+16015500(Top 58%)4981(Top 44%)4981(Top 102%)
20K12.43 mi3.11 mi16070+235349-75349-716117(Top 61%)5419(Top 47%)5419(Top 111%)
Half13.11 mi0.68 mi16035+355332+175332+1715528(Top 58%)5000(Top 44%)5000(Top 102%)
25K15.53 mi2.42 mi15837+1985235+975235+9714987(Top 56%)4829(Top 42%)4829(Top 99%)
30K18.64 mi3.11 mi15750+875225+105225+1015397(Top 58%)5163(Top 45%)5163(Top 106%)
20M20.00 mi1.36 mi15725+255224+15224+115972(Top 60%)5554(Top 49%)5554(Top 114%)
21M21.00 mi1.00 mi15689+365239-155239-1515268(Top 57%)5205(Top 46%)5205(Top 107%)
35K21.75 mi0.75 mi15668+215236+35236+315491(Top 58%)5397(Top 47%)5397(Top 111%)
23M23.00 mi1.25 mi15496+1725159+775159+7713031(Top 49%)4094(Top 36%)4094(Top 84%)
24M24.00 mi1.00 mi15228+2684993+1664993+1669732(Top 37%)2481(Top 22%)2481(Top 51%)
40K24.85 mi0.85 mi15028+2004894+994894+999935(Top 37%)2633(Top 23%)2633(Top 54%)
25.2M25.20 mi0.35 mi14963+654865+294865+2911431(Top 43%)3443(Top 30%)3443(Top 70%)
Finish26.22 mi1.02 mi14769+1944770+954770+959939(Top 37%)2686(Top 24%)2686(Top 55%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21story building
+97ft-345ft

Overall

15500

Females

4981

F18-39

4981

5K→10K

3.1 - 6.2 mi

Top 56%
×5story building
+79ft-138ft

Overall

15029

Females

4698

F18-39

4698

10K→15K

6.2 - 9.3 mi

Top 58%
×3story building
+67ft-78ft

Overall

15500

Females

4981

F18-39

4981

15K→20K

9.3 - 12.4 mi

Top 61%
×5story building
+106ft-86ft

Overall

16117

Females

5419

F18-39

5419

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

15528

Females

5000

F18-39

5000

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

14987

Females

4829

F18-39

4829

25K→30K

15.5 - 18.6 mi

Top 58%
×9story building
+181ft-148ft

Overall

15397

Females

5163

F18-39

5163

30K→20M

18.6 - 20.0 mi

Top 60%
×5story building
+64ft-50ft

Overall

15972

Females

5554

F18-39

5554

20M→21M

20.0 - 21.0 mi

Top 57%
×8story building
+106ft-24ft

Overall

15268

Females

5205

F18-39

5205

21M→35K

21.0 - 21.8 mi

Top 58%
×7story building
+17ft-86ft

Overall

15491

Females

5397

F18-39

5397

35K→23M

21.8 - 23.0 mi

Top 49%
×5story building
+23ft-63ft

Overall

13031

Females

4094

F18-39

4094

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

9732

Females

2481

F18-39

2481

24M→40K

24.0 - 24.9 mi

Top 37%
×1story
+6ft-20ft

Overall

9935

Females

2633

F18-39

2633

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

11431

Females

3443

F18-39

3443

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2story building
+22ft-21ft

Overall

9939

Females

2686

F18-39

2686

Passing Analysis

Category:
Athletes Passed
3679
Passed By
690
Net Change
+2989
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17758
5K → 10K143541+1394#17758#16364
10K → 15K35685+271#16364#16093
15K → 20K184161+23#16093#16070
20K → Half4914+35#16070#16035
Half → 25K24143+198#16035#15837
25K → 30K222135+87#15837#15750
30K → 20M10277+25#15750#15725
20M → 21M10771+36#15725#15689
21M → 35K5332+21#15689#15668
35K → 23M18614+172#15668#15496
23M → 24M2691+268#15496#15228
24M → 40K2033+200#15228#15028
40K → 25.2M705+65#15028#14963
25.2M → Finish2028+194#14963#14769
TOTALS3679690+2989
📊

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