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BOSTON MARATHON 2023

Alyssa Lozier

Bib: 13721•F

IN

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 36%
Gender (Female)
#0 / 11423
Top 16%
Masters (Masters Women)
#0 / 6539
Top 7%
Division (F40-44)
#0 / 1878
Top 14%
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
7:37/mi
23:39
↑ 97↓ 3451.5%
10K· 6.21 mi
7:27/mi
46:47
↑ 79↓ 1380.4%
15K· 9.32 mi
7:27/mi
1:09:55
↑ 67↓ 78
20K· 12.43 mi
7:35/mi
1:33:29
↑ 106↓ 860.1%
Half· 13.11 mi
7:29/mi
1:38:35
↑ 19↓ 370.5%
25K· 15.53 mi
7:35/mi
1:56:58
↑ 66↓ 880.2%
30K· 18.64 mi
7:43/mi
2:20:58
↑ 181↓ 1480.2%
20M
7:42/mi
2:31:26
↑ 64↓ 500.2%
21M
8:12/mi
2:39:38
↑ 106↓ 241.6%
35K· 21.75 mi
7:38/mi
2:45:21
↑ 17↓ 861.7%
23M
7:59/mi
2:55:21
↑ 23↓ 630.6%
24M
7:48/mi
3:03:09
↓ 821.3%
40K· 24.85 mi
7:58/mi
3:09:58
↓ 200.3%
25.2M
8:48/mi
3:13:00
↑ 13↓ 160.2%
Finish· 26.22 mi
8:08/mi
3:21:17
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:35
Pace7:31 /mi
2nd Half
Distance13.11 mi
Time1:42:42
Pace7:50 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:5723:397:3723:39
7:37
-
10K
6.21 mi11:15:0546:477:3223:08
7:27
-0:10
15K
9.32 mi11:38:131:09:557:3023:08
7:27
0:00
20K
12.43 mi12:01:471:33:297:3123:34
7:35
+0:08
Half
13.11 mi12:06:531:38:357:315:06
7:29
-0:06
25K
15.53 mi12:25:161:56:587:3218:23
7:35
+0:06
30K
18.64 mi12:49:162:20:587:3424:00
7:43
+0:08
20M
20.00 mi12:59:442:31:267:3410:28
7:42
-0:01
21M
21.00 mi13:07:562:39:387:368:12
8:12
+0:30
35K
21.75 mi13:13:392:45:217:365:43
7:38
-0:34
23M
23.00 mi13:23:392:55:217:3710:00
7:59
+0:21
24M
24.00 mi13:31:273:03:097:387:48
7:48
-0:11
40K
24.85 mi13:38:163:09:587:396:49
7:58
+0:10
25.2M
25.20 mi13:41:183:13:007:403:02
8:48
+0:50
Finish
26.22 mi13:49:353:21:177:418:17
8:08
-0:40

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

7:27 /mi

Average Pace

7:41 /mi

Slowest Pace

8:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:10:03

94% of race

Time at Steady Pace

8:12

4% of race

Time at Slower Pace

3:02

2% of race

Average Pace: 7:41 /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 mi10:51:5723:397:3723:39
7:37
#10654
10K
6.21 mi11:15:0546:477:3223:08
7:27
#10306
15K
9.32 mi11:38:131:09:557:3023:08
7:27
#10071
20K
12.43 mi12:01:471:33:297:3123:34
7:35
#10032
Half
13.11 mi12:06:531:38:357:315:06
7:29
#10017
25K
15.53 mi12:25:161:56:587:3218:23
7:35
#9888
30K
18.64 mi12:49:162:20:587:3424:00
7:43
#9679
20M
20.00 mi12:59:442:31:267:3410:28
7:42
#9537
21M
21.00 mi13:07:562:39:387:368:12
8:12
#9449
35K
21.75 mi13:13:392:45:217:365:43
7:38
#9438
23M
23.00 mi13:23:392:55:217:3710:00
7:59
#9402
24M
24.00 mi13:31:273:03:097:387:48
7:48
#9404
40K
24.85 mi13:38:163:09:587:396:49
7:58
#9402
25.2M
25.20 mi13:41:183:13:007:403:02
8:48
#9404
Finish
26.22 mi13:49:353:21:177:418:17
8:08
#9529
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi10654216021609746(Top 37%)1727(Top 15%)1727(Top 92%)
10K6.21 mi3.10 mi10306+3481974+1861974+18610044(Top 38%)1846(Top 16%)1846(Top 98%)
15K9.32 mi3.11 mi10071+2351854+1201854+1209746(Top 37%)1727(Top 15%)1727(Top 92%)
20K12.43 mi3.11 mi10032+391842+121842+129989(Top 38%)1907(Top 17%)1907(Top 102%)
Half13.11 mi0.68 mi10017+151841+11841+110084(Top 38%)1920(Top 17%)1920(Top 102%)
25K15.53 mi2.42 mi9888+1291805+361805+369425(Top 35%)1745(Top 15%)1745(Top 93%)
30K18.64 mi3.11 mi9679+2091755+501755+508840(Top 33%)1651(Top 14%)1651(Top 88%)
20M20.00 mi1.36 mi9537+1421722+331722+338240(Top 31%)1499(Top 13%)1499(Top 80%)
21M21.00 mi1.00 mi9449+881714+81714+88644(Top 32%)1773(Top 16%)1773(Top 94%)
35K21.75 mi0.75 mi9438+111726-121726-129589(Top 36%)2174(Top 19%)2174(Top 116%)
23M23.00 mi1.25 mi9402+361728-21728-29665(Top 36%)2329(Top 20%)2329(Top 124%)
24M24.00 mi1.00 mi9404-21764-361764-369812(Top 37%)2497(Top 22%)2497(Top 133%)
40K24.85 mi0.85 mi9402+21791-271791-279888(Top 37%)2586(Top 23%)2586(Top 138%)
25.2M25.20 mi0.35 mi9404-21804-131804-1311334(Top 43%)3346(Top 29%)3346(Top 178%)
Finish26.22 mi1.02 mi9529-1251879-751879-7512978(Top 49%)4194(Top 37%)4194(Top 223%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21story building
+97ft-345ft

Overall

9746

Females

1727

F40-44

1727

5K→10K

3.1 - 6.2 mi

Top 38%
×5story building
+79ft-138ft

Overall

10044

Females

1846

F40-44

1846

10K→15K

6.2 - 9.3 mi

Top 37%
×3story building
+67ft-78ft

Overall

9746

Females

1727

F40-44

1727

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

9989

Females

1907

F40-44

1907

20K→Half

12.4 - 13.1 mi

Top 38%
×2story building
+19ft-37ft

Overall

10084

Females

1920

F40-44

1920

Half→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

9425

Females

1745

F40-44

1745

25K→30K

15.5 - 18.6 mi

Top 33%
×9story building
+181ft-148ft

Overall

8840

Females

1651

F40-44

1651

30K→20M

18.6 - 20.0 mi

Top 31%
×5story building
+64ft-50ft

Overall

8240

Females

1499

F40-44

1499

20M→21M

20.0 - 21.0 mi

Top 32%
×8story building
+106ft-24ft

Overall

8644

Females

1773

F40-44

1773

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

9589

Females

2174

F40-44

2174

35K→23M

21.8 - 23.0 mi

Top 36%
×5story building
+23ft-63ft

Overall

9665

Females

2329

F40-44

2329

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

9812

Females

2497

F40-44

2497

24M→40K

24.0 - 24.9 mi

Top 37%
×1story
+6ft-20ft

Overall

9888

Females

2586

F40-44

2586

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

11334

Females

3346

F40-44

3346

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2story building
+22ft-21ft

Overall

12978

Females

4194

F40-44

4194

Passing Analysis

Category:
Athletes Passed
2122*
Passed By
997
Net Change
+1125
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10654
5K → 10K504*156+348#10654#10306
10K → 15K31176+235#10306#10071
15K → 20K198*159+39#10071#10032
20K → Half3520+15#10032#10017
Half → 25K175*46+129#10017#9888
25K → 30K272*63+209#9888#9679
30K → 20M16119+142#9679#9537
20M → 21M12032+88#9537#9449
21M → 35K5847+11#9449#9438
35K → 23M9761+36#9438#9402
23M → 24M7375-2#9402#9404
24M → 40K6664+2#9404#9402
40K → 25.2M2931-2#9402#9404
25.2M → Finish23148-125#9404#9529
TOTALS2122*997+1125

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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