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BOSTON MARATHON 2023

Alaina Kronenberg

Bib: 20700•F

MI

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

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
8:45/mi
27:10
↑ 97↓ 3451.5%
10K· 6.21 mi
8:43/mi
54:16
↑ 79↓ 1380.4%
15K· 9.32 mi
8:44/mi
1:21:23
↑ 67↓ 78
20K· 12.43 mi
8:57/mi
1:49:11
↑ 106↓ 860.1%
Half· 13.11 mi
8:48/mi
1:55:11
↑ 19↓ 370.5%
25K· 15.53 mi
9:00/mi
2:17:01
↑ 66↓ 880.2%
30K· 18.64 mi
9:26/mi
2:46:18
↑ 181↓ 1480.2%
20M
9:44/mi
2:59:31
↑ 64↓ 500.2%
21M
10:52/mi
3:10:23
↑ 106↓ 241.6%
35K· 21.75 mi
9:20/mi
3:17:22
↑ 17↓ 861.7%
23M
9:59/mi
3:29:52
↑ 23↓ 630.6%
24M
9:40/mi
3:39:32
↓ 821.3%
40K· 24.85 mi
9:59/mi
3:48:04
↓ 200.3%
25.2M
10:47/mi
3:51:47
↑ 13↓ 160.2%
Finish· 26.22 mi
9:29/mi
4:01:27
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:11
Pace8:47 /mi
2nd Half
Distance13.11 mi
Time2:06:16
Pace9:38 /mi
📊Positive Split: 9.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:3027:108:4527:10
8:45
-
10K
6.21 mi11:46:3654:168:4427:06
8:43
-0:02
15K
9.32 mi12:13:431:21:238:4427:07
8:44
+0:01
20K
12.43 mi12:41:311:49:118:4727:48
8:57
+0:13
Half
13.11 mi12:47:311:55:118:476:00
8:48
-0:09
25K
15.53 mi13:09:212:17:018:4921:50
9:00
+0:12
30K
18.64 mi13:38:382:46:188:5529:17
9:26
+0:26
20M
20.00 mi13:51:512:59:318:5913:13
9:44
+0:18
21M
21.00 mi14:02:433:10:239:0410:52
10:52
+1:08
35K
21.75 mi14:09:423:17:229:056:59
9:20
-1:32
23M
23.00 mi14:22:123:29:529:0712:30
9:59
+0:39
24M
24.00 mi14:31:523:39:329:099:40
9:40
-0:19
40K
24.85 mi14:40:243:48:049:118:32
9:59
+0:19
25.2M
25.20 mi14:44:073:51:479:123:43
10:47
+0:48
Finish
26.22 mi14:53:474:01:279:139:40
9:29
-1:18

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

8:43 /mi

Average Pace

9:13 /mi

Slowest Pace

10:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:17:01

57% of race

Time at Steady Pace

1:08:49

29% of race

Time at Slower Pace

35:37

15% of race

Average Pace: 9:13 /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 mi11:19:3027:108:4527:10
8:45
#19157
10K
6.21 mi11:46:3654:168:4427:06
8:43
#19328
15K
9.32 mi12:13:431:21:238:4427:07
8:44
#19221
20K
12.43 mi12:41:311:49:118:4727:48
8:57
#19260
Half
13.11 mi12:47:311:55:118:476:00
8:48
#19249
25K
15.53 mi13:09:212:17:018:4921:50
9:00
#19211
30K
18.64 mi13:38:382:46:188:5529:17
9:26
#19213
20M
20.00 mi13:51:512:59:318:5913:13
9:44
#19251
21M
21.00 mi14:02:433:10:239:0410:52
10:52
#19354
35K
21.75 mi14:09:423:17:229:056:59
9:20
#19347
23M
23.00 mi14:22:123:29:529:0712:30
9:59
#19424
24M
24.00 mi14:31:523:39:329:099:40
9:40
#19444
40K
24.85 mi14:40:243:48:049:118:32
9:59
#19484
25.2M
25.20 mi14:44:073:51:479:123:43
10:47
#19504
Finish
26.22 mi14:53:474:01:279:139:40
9:29
#19537
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi191577298729819136(Top 72%)7184(Top 63%)7184(Top 395%)
10K6.21 mi3.10 mi19328-1717354-567354-5619557(Top 73%)7424(Top 65%)7424(Top 409%)
15K9.32 mi3.11 mi19221+1077263+917263+9119136(Top 72%)7184(Top 63%)7184(Top 395%)
20K12.43 mi3.11 mi19260-397277-147277-1419461(Top 73%)7360(Top 64%)7360(Top 405%)
Half13.11 mi0.68 mi19249+117266+117266+1119508(Top 73%)7386(Top 65%)7386(Top 406%)
25K15.53 mi2.42 mi19211+387248+187248+1818994(Top 71%)7130(Top 62%)7130(Top 392%)
30K18.64 mi3.11 mi19213-27265-177265-1719159(Top 72%)7283(Top 64%)7283(Top 401%)
20M20.00 mi1.36 mi19251-387303-387303-3819633(Top 74%)7651(Top 67%)7651(Top 421%)
21M21.00 mi1.00 mi19354-1037375-727375-7220535(Top 77%)8208(Top 72%)8208(Top 452%)
35K21.75 mi0.75 mi19347+77377-27377-219309(Top 73%)7550(Top 66%)7550(Top 416%)
23M23.00 mi1.25 mi19424-777419-427419-4219950(Top 75%)7925(Top 69%)7925(Top 436%)
24M24.00 mi1.00 mi19444-207449-307449-3019783(Top 74%)7854(Top 69%)7854(Top 432%)
40K24.85 mi0.85 mi19484-407481-327481-3219910(Top 75%)8011(Top 70%)8011(Top 441%)
25.2M25.20 mi0.35 mi19504-207498-177498-1719935(Top 75%)8024(Top 70%)8024(Top 442%)
Finish26.22 mi1.02 mi19537-337526-287526-2820078(Top 75%)8046(Top 70%)8046(Top 443%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21story building
+97ft-345ft

Overall

19136

Females

7184

F45-49

7184

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

19557

Females

7424

F45-49

7424

10K→15K

6.2 - 9.3 mi

Top 72%
×3story building
+67ft-78ft

Overall

19136

Females

7184

F45-49

7184

15K→20K

9.3 - 12.4 mi

Top 73%
×5story building
+106ft-86ft

Overall

19461

Females

7360

F45-49

7360

20K→Half

12.4 - 13.1 mi

Top 73%
×2story building
+19ft-37ft

Overall

19508

Females

7386

F45-49

7386

Half→25K

13.1 - 15.5 mi

Top 71%
×4story building
+66ft-88ft

Overall

18994

Females

7130

F45-49

7130

25K→30K

15.5 - 18.6 mi

Top 72%
×9story building
+181ft-148ft

Overall

19159

Females

7283

F45-49

7283

30K→20M

18.6 - 20.0 mi

Top 74%
×5story building
+64ft-50ft

Overall

19633

Females

7651

F45-49

7651

20M→21M

20.0 - 21.0 mi

Top 77%
×8story building
+106ft-24ft

Overall

20535

Females

8208

F45-49

8208

21M→35K

21.0 - 21.8 mi

Top 73%
×7story building
+17ft-86ft

Overall

19309

Females

7550

F45-49

7550

35K→23M

21.8 - 23.0 mi

Top 75%
×5story building
+23ft-63ft

Overall

19950

Females

7925

F45-49

7925

23M→24M

23.0 - 24.0 mi

Top 74%
×6story building
+12ft-82ft

Overall

19783

Females

7854

F45-49

7854

24M→40K

24.0 - 24.9 mi

Top 75%
×1story
+6ft-20ft

Overall

19910

Females

8011

F45-49

8011

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

19935

Females

8024

F45-49

8024

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

20078

Females

8046

F45-49

8046

Passing Analysis

Category:
Athletes Passed
1325
Passed By
1705
Net Change
-380
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19157
5K → 10K258429-171#19157#19328
10K → 15K240133+107#19328#19221
15K → 20K146185-39#19221#19260
20K → Half2817+11#19260#19249
Half → 25K140102+38#19249#19211
25K → 30K163165-2#19211#19213
30K → 20M70108-38#19213#19251
20M → 21M55158-103#19251#19354
21M → 35K3629+7#19354#19347
35K → 23M58135-77#19347#19424
23M → 24M5070-20#19424#19444
24M → 40K3575-40#19444#19484
40K → 25.2M1636-20#19484#19504
25.2M → Finish3063-33#19504#19537
TOTALS13251705-380
📊

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