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BOSTON MARATHON 2023

Sofia Loewens

Bib: 30310•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 50%
Masters (Masters Women)
#0 / 6539
Top 40%
Division (F40-44)
#0 / 1878
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
8:03/mi
25:00
↑ 97↓ 3451.5%
10K· 6.21 mi
8:20/mi
50:53
↑ 79↓ 1380.4%
15K· 9.32 mi
8:28/mi
1:17:10
↑ 67↓ 78
20K· 12.43 mi
8:32/mi
1:43:41
↑ 106↓ 860.1%
Half· 13.11 mi
8:30/mi
1:49:29
↑ 19↓ 370.5%
25K· 15.53 mi
8:34/mi
2:10:15
↑ 66↓ 880.2%
30K· 18.64 mi
8:50/mi
2:37:43
↑ 181↓ 1480.2%
20M
9:01/mi
2:49:58
↑ 64↓ 500.2%
21M
9:41/mi
2:59:39
↑ 106↓ 241.6%
35K· 21.75 mi
8:35/mi
3:06:04
↑ 17↓ 861.7%
23M
8:55/mi
3:17:14
↑ 23↓ 630.6%
24M
8:45/mi
3:25:59
↓ 821.3%
40K· 24.85 mi
8:53/mi
3:33:35
↓ 200.3%
25.2M
9:43/mi
3:36:56
↑ 13↓ 160.2%
Finish· 26.22 mi
8:56/mi
3:46:02
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:29
Pace8:21 /mi
2nd Half
Distance13.11 mi
Time1:56:33
Pace8:53 /mi
📊Positive Split: 6.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:2925:008:0325:00
8:03
-
10K
6.21 mi11:20:2250:538:1125:53
8:20
+0:17
15K
9.32 mi11:46:391:17:108:1726:17
8:28
+0:08
20K
12.43 mi12:13:101:43:418:2126:31
8:32
+0:04
Half
13.11 mi12:18:581:49:298:215:48
8:30
-0:02
25K
15.53 mi12:39:442:10:158:2320:46
8:34
+0:04
30K
18.64 mi13:07:122:37:438:2827:28
8:50
+0:16
20M
20.00 mi13:19:272:49:588:3012:15
9:01
+0:11
21M
21.00 mi13:29:082:59:398:339:41
9:41
+0:40
35K
21.75 mi13:35:333:06:048:336:25
8:35
-1:06
23M
23.00 mi13:46:433:17:148:3511:10
8:55
+0:20
24M
24.00 mi13:55:283:25:598:358:45
8:45
-0:10
40K
24.85 mi14:03:043:33:358:367:36
8:53
+0:08
25.2M
25.20 mi14:06:253:36:568:373:21
9:43
+0:50
Finish
26.22 mi14:15:313:46:028:389:06
8:56
-0:47

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

8:03 /mi

Average Pace

8:38 /mi

Slowest Pace

9:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:22:58

37% of race

Time at Steady Pace

1:57:47

52% of race

Time at Slower Pace

25:17

11% of race

Average Pace: 8:37 /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 mi10:54:2925:008:0325:00
8:03
#14354
10K
6.21 mi11:20:2250:538:1125:53
8:20
#15744
15K
9.32 mi11:46:391:17:108:1726:17
8:28
#16359
20K
12.43 mi12:13:101:43:418:2126:31
8:32
#16584
Half
13.11 mi12:18:581:49:298:215:48
8:30
#16646
25K
15.53 mi12:39:442:10:158:2320:46
8:34
#16642
30K
18.64 mi13:07:122:37:438:2827:28
8:50
#16532
20M
20.00 mi13:19:272:49:588:3012:15
9:01
#16526
21M
21.00 mi13:29:082:59:398:339:41
9:41
#16518
35K
21.75 mi13:35:333:06:048:336:25
8:35
#16485
23M
23.00 mi13:46:433:17:148:3511:10
8:55
#16426
24M
24.00 mi13:55:283:25:598:358:45
8:45
#16397
40K
24.85 mi14:03:043:33:358:367:36
8:53
#16341
25.2M
25.20 mi14:06:253:36:568:373:21
9:43
#16338
Finish
26.22 mi14:15:313:46:028:389:06
8:56
#16382
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi143544241424117546(Top 66%)6238(Top 55%)6238(Top 332%)
10K6.21 mi3.10 mi15744-13905123-8825123-88217137(Top 64%)5956(Top 52%)5956(Top 317%)
15K9.32 mi3.11 mi16359-6155504-3815504-38117546(Top 66%)6238(Top 55%)6238(Top 332%)
20K12.43 mi3.11 mi16584-2255672-1685672-16817087(Top 64%)5976(Top 52%)5976(Top 318%)
Half13.11 mi0.68 mi16646-625712-405712-4017732(Top 67%)6310(Top 55%)6310(Top 336%)
25K15.53 mi2.42 mi16642+45723-115723-1116598(Top 62%)5772(Top 51%)5772(Top 307%)
30K18.64 mi3.11 mi16532+1105702+215702+2116324(Top 61%)5682(Top 50%)5682(Top 303%)
20M20.00 mi1.36 mi16526+65716-145716-1416629(Top 62%)5931(Top 52%)5931(Top 316%)
21M21.00 mi1.00 mi16518+85719-35719-316790(Top 63%)6066(Top 53%)6066(Top 323%)
35K21.75 mi0.75 mi16485+335706+135706+1315768(Top 59%)5563(Top 49%)5563(Top 296%)
23M23.00 mi1.25 mi16426+595687+195687+1915651(Top 59%)5549(Top 49%)5549(Top 295%)
24M24.00 mi1.00 mi16397+295688-15688-115954(Top 60%)5782(Top 51%)5782(Top 308%)
40K24.85 mi0.85 mi16341+565679+95679+915583(Top 59%)5628(Top 49%)5628(Top 300%)
25.2M25.20 mi0.35 mi16338+35685-65685-616229(Top 61%)5996(Top 52%)5996(Top 319%)
Finish26.22 mi1.02 mi16382-445705-205705-2017635(Top 66%)6720(Top 59%)6720(Top 358%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21story building
+97ft-345ft

Overall

17546

Females

6238

F40-44

6238

5K→10K

3.1 - 6.2 mi

Top 64%
×5story building
+79ft-138ft

Overall

17137

Females

5956

F40-44

5956

10K→15K

6.2 - 9.3 mi

Top 66%
×3story building
+67ft-78ft

Overall

17546

Females

6238

F40-44

6238

15K→20K

9.3 - 12.4 mi

Top 64%
×5story building
+106ft-86ft

Overall

17087

Females

5976

F40-44

5976

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

17732

Females

6310

F40-44

6310

Half→25K

13.1 - 15.5 mi

Top 62%
×4story building
+66ft-88ft

Overall

16598

Females

5772

F40-44

5772

25K→30K

15.5 - 18.6 mi

Top 61%
×9story building
+181ft-148ft

Overall

16324

Females

5682

F40-44

5682

30K→20M

18.6 - 20.0 mi

Top 62%
×5story building
+64ft-50ft

Overall

16629

Females

5931

F40-44

5931

20M→21M

20.0 - 21.0 mi

Top 63%
×8story building
+106ft-24ft

Overall

16790

Females

6066

F40-44

6066

21M→35K

21.0 - 21.8 mi

Top 59%
×7story building
+17ft-86ft

Overall

15768

Females

5563

F40-44

5563

35K→23M

21.8 - 23.0 mi

Top 59%
×5story building
+23ft-63ft

Overall

15651

Females

5549

F40-44

5549

23M→24M

23.0 - 24.0 mi

Top 60%
×6story building
+12ft-82ft

Overall

15954

Females

5782

F40-44

5782

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15583

Females

5628

F40-44

5628

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

16229

Females

5996

F40-44

5996

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

17635

Females

6720

F40-44

6720

Passing Analysis

Category:
Athletes Passed
1175
Passed By
3203
Net Change
-2028
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14354
5K → 10K321422-1390#14354#15744
10K → 15K48663-615#15744#16359
15K → 20K105330-225#16359#16584
20K → Half1779-62#16584#16646
Half → 25K132128+4#16646#16642
25K → 30K232122+110#16642#16532
30K → 20M9084+6#16532#16526
20M → 21M8880+8#16526#16518
21M → 35K6128+33#16518#16485
35K → 23M11556+59#16485#16426
23M → 24M7647+29#16426#16397
24M → 40K10347+56#16397#16341
40K → 25.2M3330+3#16341#16338
25.2M → Finish4387-44#16338#16382
TOTALS11753203-2028
📊

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